diff --git a/ini/avr.ini b/ini/avr.ini
index 92dd8f0cdb..b13596afe1 100644
--- a/ini/avr.ini
+++ b/ini/avr.ini
@@ -13,6 +13,7 @@
 # AVR (8-bit) Common Environment values
 #
 [common_avr8]
+platform          = atmelavr@~3.4
 build_flags       = ${common.build_flags} -Wl,--relax
 board_build.f_cpu = 16000000L
 src_filter        = ${common.default_src_filter} +<src/HAL/AVR>
@@ -21,7 +22,6 @@ src_filter        = ${common.default_src_filter} +<src/HAL/AVR>
 # ATmega2560
 #
 [env:mega2560]
-platform = atmelavr
 extends  = common_avr8
 board    = megaatmega2560
 
@@ -33,7 +33,6 @@ board    = megaatmega2560
 # BOARD_EINSTART_S
 #
 [env:mega2560ext]
-platform            = atmelavr
 extends             = env:mega2560
 board_build.variant = MARLIN_MEGA_EXTENDED
 extra_scripts       = ${common.extra_scripts}
@@ -43,7 +42,6 @@ extra_scripts       = ${common.extra_scripts}
 # ATmega1280
 #
 [env:mega1280]
-platform = atmelavr
 extends  = common_avr8
 board    = megaatmega1280
 
@@ -61,7 +59,6 @@ build_flags         = ${common.build_flags} -fno-tree-scev-cprop -fno-split-wide
 # MightyBoard ATmega1280
 #
 [env:MightyBoard1280]
-platform = atmelavr
 extends  = mega_extended_optimized
 board    = megaatmega1280
 
@@ -69,7 +66,6 @@ board    = megaatmega1280
 # MightyBoard ATmega2560
 #
 [env:MightyBoard2560]
-platform = atmelavr
 extends  = mega_extended_optimized
 board    = megaatmega2560
 
@@ -77,7 +73,6 @@ board    = megaatmega2560
 # RAMBo
 #
 [env:rambo]
-platform = atmelavr
 extends  = common_avr8
 board    = reprap_rambo
 
@@ -85,7 +80,6 @@ board    = reprap_rambo
 # FYSETC F6 V1.3 / V1.4
 #
 [env:FYSETC_F6]
-platform = atmelavr
 extends  = common_avr8
 board    = fysetc_f6_13
 
@@ -93,7 +87,6 @@ board    = fysetc_f6_13
 # Sanguinololu (ATmega644p)
 #
 [env:sanguino644p]
-platform = atmelavr
 extends  = common_avr8
 board    = sanguino_atmega644p
 
@@ -101,7 +94,6 @@ board    = sanguino_atmega644p
 # Sanguinololu (ATmega1284p)
 #
 [env:sanguino1284p]
-platform                  = atmelavr
 extends                   = common_avr8
 board                     = sanguino_atmega1284p
 board_upload.maximum_size = 126976
@@ -114,7 +106,6 @@ board_upload.maximum_size = 126976
 build_flags = ${common.build_flags} -fno-tree-scev-cprop -fno-split-wide-types -Wl,--relax -mcall-prologues
 
 [env:sanguino1284p_optimized]
-platform    = atmelavr
 extends     = env:sanguino1284p
 build_flags = ${tuned_1284p.build_flags}
 
@@ -122,12 +113,10 @@ build_flags = ${tuned_1284p.build_flags}
 # Melzi and clones (ATmega1284p)
 #
 [env:melzi]
-platform     = atmelavr
 extends      = env:sanguino1284p
 upload_speed = 57600
 
 [env:melzi_optimized]
-platform     = atmelavr
 extends      = env:sanguino1284p_optimized
 upload_speed = 57600
 
@@ -135,7 +124,6 @@ upload_speed = 57600
 # Melzi and clones (Optiboot bootloader)
 #
 [env:melzi_optiboot]
-platform     = atmelavr
 extends      = common_avr8
 board        = sanguino_atmega1284p
 upload_speed = 115200
@@ -145,6 +133,5 @@ board_upload.maximum_size = 130048
 # Melzi and clones (Zonestar Melzi2 with tuned flags)
 #
 [env:melzi_optiboot_optimized]
-platform    = atmelavr
 extends     = env:melzi_optiboot
 build_flags = ${tuned_1284p.build_flags}
diff --git a/ini/due.ini b/ini/due.ini
index 9123af8cdc..28b6838307 100644
--- a/ini/due.ini
+++ b/ini/due.ini
@@ -21,7 +21,6 @@ board      = due
 src_filter = ${common.default_src_filter} +<src/HAL/DUE> +<src/HAL/shared/backtrace>
 
 [env:DUE_USB]
-platform = atmelsam
 extends  = env:DUE
 board    = dueUSB
 
@@ -29,7 +28,6 @@ board    = dueUSB
 # Archim SAM
 #
 [common_DUE_archim]
-platform                 = atmelsam
 extends                  = env:DUE
 board                    = marlin_archim
 build_flags              = ${common.build_flags}
@@ -39,5 +37,4 @@ extra_scripts            = ${common.extra_scripts}
   Marlin/src/HAL/DUE/upload_extra_script.py
 
 [env:DUE_archim]
-platform = ${common_DUE_archim.platform}
 extends  = common_DUE_archim
diff --git a/ini/esp32.ini b/ini/esp32.ini
index 0815486cc9..4ac6b96f5c 100644
--- a/ini/esp32.ini
+++ b/ini/esp32.ini
@@ -24,12 +24,10 @@ monitor_speed = 250000
 #board_build.flash_mode = qio
 
 [env:FYSETC_E4]
-platform               = espressif32@2.1.0
 extends                = env:esp32
 board_build.partitions = default_16MB.csv
 
 [env:PANDA]
-platform      = espressif32@2.1.0
 extends       = env:esp32
 build_flags   = ${env:esp32.build_flags} -DUSE_ESP32_EXIO -DUSE_ESP32_TASK_WDT
 lib_deps      = ${common.lib_deps}
@@ -40,5 +38,4 @@ monitor_speed = 115200
 
 [env:mks_tinybee]
 extends                = env:esp32
-platform               = espressif32@2.1.0
 board_build.partitions = default_8MB.csv
diff --git a/ini/lpc176x.ini b/ini/lpc176x.ini
index 3c5f43764b..95f5637a5d 100644
--- a/ini/lpc176x.ini
+++ b/ini/lpc176x.ini
@@ -34,11 +34,9 @@ build_flags       = ${common.build_flags} -DU8G_HAL_LINKS -IMarlin/src/HAL/LPC17
 # NXP LPC176x ARM Cortex-M3
 #
 [env:LPC1768]
-platform = ${common_LPC.platform}
 extends  = common_LPC
 board    = nxp_lpc1768
 
 [env:LPC1769]
-platform = ${common_LPC.platform}
 extends  = common_LPC
 board    = nxp_lpc1769
diff --git a/ini/native.ini b/ini/native.ini
index fe5fe3a5d0..5355284992 100644
--- a/ini/native.ini
+++ b/ini/native.ini
@@ -52,12 +52,10 @@ extends     = simulator_common
 build_flags = ${simulator_common.build_flags} -ldl -lpthread -lSDL2 -lSDL2_net -lGL
 
 [env:simulator_linux_debug]
-platform   = ${simulator_linux.platform}
 extends    = simulator_linux
 build_type = debug
 
 [env:simulator_linux_release]
-platform    = ${simulator_linux.platform}
 extends     = simulator_linux
 build_type  = release
 build_flags = ${simulator_linux.build_flags} ${simulator_linux.release_flags}
@@ -92,13 +90,11 @@ build_flags       =
   -lSDL2
 
 [env:simulator_macos_debug]
-platform        = ${env:simulator_linux_release.platform}
 extends         = env:simulator_linux_debug
 build_flags     = ${env:simulator_linux_debug.build_flags} ${simulator_macos.build_flags} -ggdb -Og -D_THREAD_SAFE
 build_unflags   = ${simulator_macos.build_unflags}
 
 [env:simulator_macos_release]
-platform        = ${env:simulator_linux_release.platform}
 extends         = env:simulator_linux_release
 build_flags     = ${env:simulator_linux_release.build_flags} ${simulator_macos.build_flags}
 build_unflags   = ${simulator_macos.build_unflags}
@@ -110,7 +106,6 @@ build_unflags   = ${simulator_macos.build_unflags}
 #  pacman -S --needed base-devel mingw-w64-x86_64-toolchain mingw64/mingw-w64-x86_64-glm mingw64/mingw-w64-x86_64-SDL2 mingw64/mingw-w64-x86_64-SDL2_net mingw-w64-x86_64-dlfcn
 #
 [env:simulator_windows]
-platform    = ${simulator_common.platform}
 extends     = simulator_common
 src_build_flags = ${simulator_common.src_build_flags} -fpermissive
 build_flags = ${simulator_common.build_flags} ${simulator_common.debug_build_flags} -IC:\\msys64\\mingw64\\include\\SDL2 -fno-stack-protector -Wl,-subsystem,windows -ldl -lmingw32 -lSDL2main -lSDL2 -lSDL2_net -lopengl32 -lssp
diff --git a/ini/stm32f0.ini b/ini/stm32f0.ini
index 4559f115bd..d6251344c3 100644
--- a/ini/stm32f0.ini
+++ b/ini/stm32f0.ini
@@ -23,7 +23,6 @@
 # Malyan M200 v2 (STM32F070RB)
 #
 [env:STM32F070RB_malyan]
-platform    = ${common_stm32.platform}
 extends     = common_stm32
 board       = marlin_malyanM200v2
 build_flags = ${common_stm32.build_flags} -DHAL_PCD_MODULE_ENABLED
@@ -34,7 +33,6 @@ build_flags = ${common_stm32.build_flags} -DHAL_PCD_MODULE_ENABLED
 # Malyan M200 v2 (STM32F070CB)
 #
 [env:STM32F070CB_malyan]
-platform    = ${common_stm32.platform}
 extends     = common_stm32
 board       = malyanm200_f070cb
 build_flags = ${common_stm32.build_flags}
@@ -45,7 +43,6 @@ build_flags = ${common_stm32.build_flags}
 # Malyan M300 (STM32F070CB)
 #
 [env:malyan_M300]
-platform    = ${common_stm32.platform}
 extends     = common_stm32
 board       = malyanm300_f070cb
 build_flags = ${common_stm32.build_flags}
diff --git a/ini/stm32f1-maple.ini b/ini/stm32f1-maple.ini
index 969bb815da..878ccd6f7c 100644
--- a/ini/stm32f1-maple.ini
+++ b/ini/stm32f1-maple.ini
@@ -42,7 +42,6 @@ extra_scripts     = ${common.extra_scripts}
 # STM32F103RC
 #
 [common_STM32F103RC_maple]
-platform          = ${common_stm32f1.platform}
 extends           = common_stm32f1
 board             = genericSTM32F103RC
 monitor_speed     = 115200
@@ -51,7 +50,6 @@ monitor_speed     = 115200
 # MEEB_3DP (STM32F103RCT6 with 512K)
 #
 [env:STM32F103RC_meeb]
-platform          = ${common_stm32f1.platform}
 extends           = common_STM32F103RC_maple
 board             = marlin_MEEB_3DP
 build_flags       = ${common_stm32f1.build_flags}
@@ -75,7 +73,6 @@ upload_protocol   = dfu
 # FYSETC STM32F103RC
 #
 [env:STM32F103RC_fysetc_maple]
-platform          = ${common_stm32f1.platform}
 extends           = common_STM32F103RC_maple
 extra_scripts     = ${common_stm32f1.extra_scripts}
   buildroot/share/PlatformIO/scripts/STM32F103RC_fysetc.py
@@ -91,7 +88,6 @@ upload_protocol   = serial
 #   STM32F103RC_btt_USB_maple ......... RCT6 with 256K (USB mass storage)
 #
 [env:STM32F103RC_btt_maple]
-platform             = ${common_stm32f1.platform}
 extends              = common_STM32F103RC_maple
 board_build.address  = 0x08007000
 board_build.ldscript = STM32F103RC_SKR_MINI_256K.ld
@@ -102,7 +98,6 @@ build_flags          = ${common_stm32f1.build_flags}
 monitor_speed        = 115200
 
 [env:STM32F103RC_btt_USB_maple]
-platform          = ${common_stm32f1.platform}
 extends           = env:STM32F103RC_btt_maple
 build_flags       = ${env:STM32F103RC_btt_maple.build_flags} -DUSE_USB_COMPOSITE
 lib_deps          = ${env:STM32F103RC_btt_maple.lib_deps}
@@ -112,7 +107,6 @@ lib_deps          = ${env:STM32F103RC_btt_maple.lib_deps}
 # Generic STM32F103RE environment
 #
 [env:STM32F103RE_maple]
-platform          = ${common_stm32f1.platform}
 extends           = common_stm32f1
 board             = genericSTM32F103RE
 monitor_speed     = 115200
@@ -121,7 +115,6 @@ monitor_speed     = 115200
 # Creality (STM32F103RET6)
 #
 [env:STM32F103RET6_creality_maple]
-platform             = ${common_stm32f1.platform}
 extends              = env:STM32F103RE_maple
 build_flags          = ${common_stm32f1.build_flags} -DTEMP_TIMER_CHAN=4
 board_build.address  = 0x08007000
@@ -139,7 +132,6 @@ upload_protocol      = jlink
 #   STM32F103RE_btt_USB_maple ......... RET6 (USB mass storage)
 #
 [env:STM32F103RE_btt_maple]
-platform          = ${common_stm32f1.platform}
 extends           = env:STM32F103RE_maple
 board_build.address  = 0x08007000
 board_build.ldscript = STM32F103RE_SKR_MINI_512K.ld
@@ -150,7 +142,6 @@ debug_tool        = stlink
 upload_protocol   = stlink
 
 [env:STM32F103RE_btt_USB_maple]
-platform          = ${common_stm32f1.platform}
 extends           = env:STM32F103RE_btt_maple
 build_flags       = ${env:STM32F103RE_btt_maple.build_flags} -DUSE_USB_COMPOSITE
 lib_deps          = ${common_stm32f1.lib_deps}
@@ -160,7 +151,6 @@ lib_deps          = ${common_stm32f1.lib_deps}
 # Geeetech GTM32 (STM32F103VET6)
 #
 [env:STM32F103VE_GTM32]
-platform        = ${common_stm32f1.platform}
 extends         = common_stm32f1
 board           = genericSTM32F103VE
 build_flags     = ${common_stm32f1.build_flags}
@@ -174,7 +164,6 @@ upload_protocol = serial
 # Longer 3D board in Alfawise U20 (STM32F103VET6)
 #
 [env:STM32F103VE_longer_maple]
-platform      = ${common_stm32f1.platform}
 extends       = common_stm32f1
 board         = genericSTM32F103VE
 board_build.address  = 0x08010000
@@ -191,7 +180,6 @@ build_unflags = ${common_stm32f1.build_unflags}
 # MKS Robin Mini (STM32F103VET6)
 #
 [env:mks_robin_mini_maple]
-platform      = ${common_stm32f1.platform}
 extends       = common_stm32f1
 board         = genericSTM32F103VE
 extra_scripts = ${common_stm32f1.extra_scripts}
@@ -203,7 +191,6 @@ build_flags   = ${common_stm32f1.build_flags}
 # MKS Robin Nano (STM32F103VET6)
 #
 [env:mks_robin_nano35_maple]
-platform        = ${common_stm32f1.platform}
 extends         = common_stm32f1
 board           = genericSTM32F103VE
 extra_scripts   = ${common_stm32f1.extra_scripts}
@@ -217,7 +204,6 @@ upload_protocol = jlink
 # MKS Robin (STM32F103ZET6)
 #
 [env:mks_robin_maple]
-platform      = ${common_stm32f1.platform}
 extends       = common_stm32f1
 board         = genericSTM32F103ZE
 extra_scripts = ${common_stm32f1.extra_scripts}
@@ -229,7 +215,6 @@ build_flags   = ${common_stm32f1.build_flags}
 # MKS Robin Pro (STM32F103ZET6)
 #
 [env:mks_robin_pro_maple]
-platform      = ${common_stm32f1.platform}
 extends       = env:mks_robin_maple
 extra_scripts = ${common_stm32f1.extra_scripts}
   buildroot/share/PlatformIO/scripts/mks_robin_pro.py
@@ -238,7 +223,6 @@ extra_scripts = ${common_stm32f1.extra_scripts}
 # TRIGORILLA PRO (STM32F103ZET6)
 #
 [env:trigorilla_pro_maple]
-platform      = ${common_stm32f1.platform}
 extends       = env:mks_robin_maple
 extra_scripts = ${common_stm32f1.extra_scripts}
 
@@ -247,7 +231,6 @@ extra_scripts = ${common_stm32f1.extra_scripts}
 # MKS Robin E3 with TMC2209
 #
 [env:mks_robin_e3_maple]
-platform      = ${common_stm32f1.platform}
 extends       = common_stm32f1
 board         = genericSTM32F103RC
 extra_scripts = ${common_stm32f1.extra_scripts}
@@ -260,7 +243,6 @@ build_flags   = ${common_stm32f1.build_flags}
 #  - LVGL UI
 #
 [env:mks_robin_e3p_maple]
-platform        = ${common_stm32f1.platform}
 extends         = common_stm32f1
 board           = genericSTM32F103VE
 extra_scripts   = ${common_stm32f1.extra_scripts}
@@ -274,7 +256,6 @@ upload_protocol = jlink
 # MKS Robin Lite/Lite2 (STM32F103RCT6)
 #
 [env:mks_robin_lite_maple]
-platform      = ${common_stm32f1.platform}
 extends       = common_stm32f1
 board         = genericSTM32F103RC
 extra_scripts = ${common_stm32f1.extra_scripts}
@@ -284,7 +265,6 @@ extra_scripts = ${common_stm32f1.extra_scripts}
 # MKS ROBIN LITE3 (STM32F103RCT6)
 #
 [env:mks_robin_lite3_maple]
-platform      = ${common_stm32f1.platform}
 extends       = common_stm32f1
 board         = genericSTM32F103RC
 extra_scripts = ${common_stm32f1.extra_scripts}
@@ -294,7 +274,6 @@ extra_scripts = ${common_stm32f1.extra_scripts}
 # JGAurora A5S A1 (STM32F103ZET6)
 #
 [env:jgaurora_a5s_a1_maple]
-platform      = ${common_stm32f1.platform}
 extends       = common_stm32f1
 board         = genericSTM32F103ZE
 board_build.address  = 0x0800A000
@@ -309,7 +288,6 @@ build_flags   = ${common_stm32f1.build_flags}
 # Malyan M200 (STM32F103CB)
 #
 [env:STM32F103CB_malyan_maple]
-platform      = ${common_stm32f1.platform}
 extends       = common_stm32f1
 board         = marlin_malyanM200
 build_flags   = ${common_stm32f1.build_flags}
@@ -322,7 +300,6 @@ lib_ignore    = ${common_stm32f1.lib_ignore}
 # Chitu boards like Tronxy X5s (STM32F103ZET6)
 #
 [env:chitu_f103_maple]
-platform      = ${common_stm32f1.platform}
 extends       = common_stm32f1
 board         = marlin_CHITU_F103
 extra_scripts = ${common_stm32f1.extra_scripts}
@@ -338,7 +315,6 @@ build_unflags = ${common_stm32f1.build_unflags}
 # Use this target if G28 or G29 are always failing.
 #
 [env:chitu_v5_gpio_init_maple]
-platform      = ${common_stm32f1.platform}
 extends       = env:chitu_f103_maple
 build_flags   = ${env:chitu_f103_maple.build_flags} -DCHITU_V5_Z_MIN_BUGFIX
 
@@ -346,7 +322,6 @@ build_flags   = ${env:chitu_f103_maple.build_flags} -DCHITU_V5_Z_MIN_BUGFIX
 # FLYmaker FLY Mini (STM32F103RCT6)
 #
 [env:FLY_MINI_maple]
-platform          = ${common_stm32f1.platform}
 extends           = common_stm32f1
 board             = genericSTM32F103RC
 board_build.address  = 0x08005000
@@ -364,7 +339,6 @@ build_flags       = ${common_stm32f1.build_flags}
 #  STM32F103VE_ZM3E4V2_USB_maple ......... VET6 with 512K
 #
 [ZONESTAR_ZM3E_maple]
-platform                  = ${common_stm32f1.platform}
 extends                   = common_stm32f1
 platform_packages         = tool-stm32duino
 board_build.address       = 0x08005000
@@ -380,20 +354,17 @@ lib_deps                  = ${common_stm32f1.lib_deps}
 lib_ignore                = Adafruit NeoPixel, SPI, SailfishLCD, SailfishRGB_LED, SlowSoftI2CMaster, TMCStepper
 
 [env:STM32F103RC_ZM3E2_USB_maple]
-platform             = ${ZONESTAR_ZM3E_maple.platform}
 extends              = ZONESTAR_ZM3E_maple
 board                = genericSTM32F103RC
 board_build.ldscript = ZONESTAR_ZM3E_256K.ld
 
 [env:STM32F103VC_ZM3E4_USB_maple]
-platform             = ${ZONESTAR_ZM3E_maple.platform}
 extends              = ZONESTAR_ZM3E_maple
 board                = genericSTM32F103VC
 board_build.ldscript = ZONESTAR_ZM3E_256K.ld
 build_flags          = ${ZONESTAR_ZM3E_maple.build_flags} -DTONE_TIMER=1 -DTONE_CHANNEL=2
 
 [env:STM32F103VE_ZM3E4V2_USB_maple]
-platform             = ${ZONESTAR_ZM3E_maple.platform}
 extends              = ZONESTAR_ZM3E_maple
 board                = genericSTM32F103VE
 board_build.ldscript = ZONESTAR_ZM3E_512K.ld
@@ -404,7 +375,6 @@ board_upload.maximum_size = 499712
 # ERYONE ERY32 Mini (STM32F103VET6)
 #
 [env:ERYONE_ERY32_MINI_maple]
-platform             = ${common_stm32f1.platform}
 extends              = common_stm32f1
 board                = genericSTM32F103VE
 build_flags          = ${common_stm32f1.build_flags}
diff --git a/ini/stm32f1.ini b/ini/stm32f1.ini
index a2cd1b0f58..939f51ffbf 100644
--- a/ini/stm32f1.ini
+++ b/ini/stm32f1.ini
@@ -30,7 +30,6 @@ monitor_speed        = 115200
 # STM32F103RE
 #
 [env:STM32F103RE]
-platform      = ${common_stm32.platform}
 extends       = common_stm32
 board         = genericSTM32F103RE
 monitor_speed = 115200
@@ -39,7 +38,6 @@ monitor_speed = 115200
 # STM32F103VE
 #
 [env:STM32F103VE]
-platform      = ${common_stm32.platform}
 extends       = common_stm32
 board         = genericSTM32F103VE
 monitor_speed = 115200
@@ -48,7 +46,6 @@ monitor_speed = 115200
 # STM32F103ZE
 #
 [env:STM32F103ZE]
-platform      = ${common_stm32.platform}
 extends       = common_stm32
 board         = genericSTM32F103ZE
 monitor_speed = 115200
@@ -60,7 +57,6 @@ monitor_speed = 115200
 #   STM32F103RC_btt_USB ......... RCT6 with 256K (USB mass storage)
 #
 [env:STM32F103RC_btt]
-platform                    = ${common_stm32.platform}
 extends                     = common_STM32F103RC_variant
 build_flags                 = ${common_STM32F103RC_variant.build_flags}
                               -DTIMER_SERVO=TIM5
@@ -68,7 +64,6 @@ board_build.offset          = 0x7000
 board_upload.offset_address = 0x08007000
 
 [env:STM32F103RC_btt_USB]
-platform          = ${common_stm32.platform}
 extends           = env:STM32F103RC_btt
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${env:STM32F103RC_btt.build_flags}
@@ -83,7 +78,6 @@ build_unflags     = ${common_stm32.build_unflags} -DUSBD_USE_CDC
 # Uses HAL STM32 to support Marlin UI for TFT screen with optional touch panel
 #
 [env:mks_robin]
-platform             = ${common_stm32.platform}
 extends              = stm32_variant
 board                = genericSTM32F103ZE
 board_build.variant  = MARLIN_F103Zx
@@ -98,7 +92,6 @@ build_unflags        = ${stm32_variant.build_unflags}
 # MKS Robin E3/E3D (STM32F103RCT6) with TMC2209
 #
 [env:mks_robin_e3]
-platform                    = ${common_stm32.platform}
 extends                     = common_STM32F103RC_variant
 board_build.encrypt         = Robin_e3.bin
 board_build.offset          = 0x5000
@@ -114,7 +107,6 @@ debug_tool                  = stlink
 # Creality (STM32F103RET6)
 #
 [env:STM32F103RET6_creality]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = genericSTM32F103RE
 board_build.variant         = MARLIN_F103Rx
@@ -139,7 +131,6 @@ upload_protocol             = jlink
 #   STM32F103RE_btt_USB ......... RET6 (USB mass storage)
 #
 [env:STM32F103RE_btt]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = genericSTM32F103RE
 board_build.variant         = MARLIN_F103Rx
@@ -154,7 +145,6 @@ debug_tool                  = jlink
 upload_protocol             = jlink
 
 [env:STM32F103RE_btt_USB]
-platform          = ${common_stm32.platform}
 extends           = env:STM32F103RE_btt
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${env:STM32F103RE_btt.build_flags}
@@ -167,7 +157,6 @@ build_unflags     = ${stm32_variant.build_unflags} -DUSBD_USE_CDC
 # board Hispeedv1
 #
 [env:flsun_hispeedv1]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = genericSTM32F103VE
 board_build.variant         = MARLIN_F103Vx
@@ -184,7 +173,6 @@ build_unflags               = ${stm32_variant.build_unflags}
 # MKS Robin Nano V1.2 and V2
 #
 [env:mks_robin_nano35]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = genericSTM32F103VE
 board_build.variant         = MARLIN_F103Vx
@@ -203,7 +191,6 @@ upload_protocol             = jlink
 # Mingda MPX_ARM_MINI
 #
 [env:mingda_mpx_arm_mini]
-platform             = ${common_stm32.platform}
 extends              = stm32_variant
 board                = genericSTM32F103ZE
 board_build.variant  = MARLIN_F103Zx
@@ -217,7 +204,6 @@ build_unflags        = ${stm32_variant.build_unflags}
 # Malyan M200 (STM32F103CB)
 #
 [env:STM32F103CB_malyan]
-platform    = ${common_stm32.platform}
 extends     = common_stm32
 board       = malyanm200_f103cb
 build_flags = ${common_stm32.build_flags}
@@ -229,7 +215,6 @@ src_filter  = ${common.default_src_filter} +<src/HAL/STM32>
 # FLYmaker FLY Mini (STM32F103RCT6)
 #
 [env:FLY_MINI]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = genericSTM32F103RC
 board_build.variant         = MARLIN_F103Rx
@@ -241,7 +226,6 @@ build_flags                 = ${stm32_variant.build_flags} -DSS_TIMER=4
 # MKS Robin Mini (STM32F103VET6)
 #
 [env:mks_robin_mini]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = genericSTM32F103VE
 board_build.variant         = MARLIN_F103Vx
@@ -255,7 +239,6 @@ build_flags                 = ${stm32_variant.build_flags}
 # MKS Robin Lite/Lite2 (STM32F103RCT6)
 #
 [env:mks_robin_lite]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = genericSTM32F103RC
 board_build.variant         = MARLIN_F103Rx
@@ -267,7 +250,6 @@ board_upload.offset_address = 0x08005000
 # MKS ROBIN LITE3 (STM32F103RCT6)
 #
 [env:mks_robin_lite3]
-platform                    = ${common_stm32.platform}
 extends                     = env:mks_robin_lite
 board_build.encrypt         = mksLite3.bin
 
@@ -275,7 +257,6 @@ board_build.encrypt         = mksLite3.bin
 # MKS Robin Pro (STM32F103ZET6)
 #
 [env:mks_robin_pro]
-platform            = ${common_stm32.platform}
 extends             = env:mks_robin
 board_build.encrypt = Robin_pro.bin
 
@@ -284,7 +265,6 @@ board_build.encrypt = Robin_pro.bin
 #  - LVGL UI
 #
 [env:mks_robin_e3p]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = genericSTM32F103VE
 board_build.variant         = MARLIN_F103Vx
@@ -301,7 +281,6 @@ upload_protocol             = jlink
 # JGAurora A5S A1 (STM32F103ZET6)
 #
 [env:jgaurora_a5s_a1]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = genericSTM32F103ZE
 board_build.variant         = MARLIN_F103Zx
@@ -317,7 +296,6 @@ extra_scripts               = ${stm32_variant.extra_scripts}
 # FYSETC STM32F103RC
 #
 [env:STM32F103RC_fysetc]
-platform        = ${common_stm32.platform}
 extends         = common_STM32F103RC_variant
 extra_scripts   = ${common_STM32F103RC_variant.extra_scripts}
                   buildroot/share/PlatformIO/scripts/STM32F103RC_fysetc.py
@@ -329,10 +307,9 @@ upload_protocol = serial
 # Longer 3D board in Alfawise U20 (STM32F103VET6)
 #
 [env:STM32F103VE_longer]
-platform                    = ${common_stm32.platform}
+extends                     = stm32_variant
 lib_deps                    = ${common.lib_deps}
   https://github.com/tpruvot/STM32_Servo_OpenDrain/archive/2.0.zip
-extends                     = stm32_variant
 board                       = genericSTM32F103VE
 board_build.variant         = MARLIN_F103VE_LONGER
 board_build.rename          = project.bin
@@ -348,7 +325,6 @@ debug_tool                  = stlink
 # TRIGORILLA PRO (STM32F103ZET6)
 #
 [env:trigorilla_pro]
-platform             = ${stm32_variant.platform}
 extends              = stm32_variant
 board                = genericSTM32F103ZE
 board_build.variant  = MARLIN_F103Zx
@@ -361,7 +337,6 @@ build_unflags        = ${stm32_variant.build_unflags}
 # Chitu boards like Tronxy X5s (STM32F103ZET6)
 #
 [env:chitu_f103]
-platform             = ${common_stm32.platform}
 extends              = stm32_variant
 board                = genericSTM32F103ZE
 board_build.variant  = MARLIN_F103Zx
@@ -377,7 +352,6 @@ extra_scripts        = ${stm32_variant.extra_scripts}
 # Use this target if G28 or G29 are always failing.
 #
 [env:chitu_v5_gpio_init]
-platform      = ${common_stm32.platform}
 extends       = env:chitu_f103
 build_flags   = ${env:chitu_f103.build_flags} -DCHITU_V5_Z_MIN_BUGFIX
 
@@ -389,7 +363,6 @@ build_flags   = ${env:chitu_f103.build_flags} -DCHITU_V5_Z_MIN_BUGFIX
 #  STM32F103VE_ZM3E4V2_USB ......... VET6 with 512K
 #
 [ZONESTAR_ZM3E]
-platform                  = ${common_stm32.platform}
 extends                   = stm32_variant
 platform_packages         = ${stm_flash_drive.platform_packages}
 board_upload.offset_address = 0x08005000
@@ -401,20 +374,17 @@ build_flags               = ${common_stm32.build_flags}
 build_unflags             = ${stm32_variant.build_unflags} -DUSBD_USE_CDC
 
 [env:STM32F103RC_ZM3E2_USB]
-platform             = ${ZONESTAR_ZM3E.platform}
 extends              = ZONESTAR_ZM3E
 board                = genericSTM32F103RC
 board_build.variant  = MARLIN_F103Rx
 
 [env:STM32F103VC_ZM3E4_USB]
-platform             = ${ZONESTAR_ZM3E.platform}
 extends              = ZONESTAR_ZM3E
 board                = genericSTM32F103VC
 board_build.variant  = MARLIN_F103Vx
 build_flags          = ${ZONESTAR_ZM3E.build_flags} -DTIMER_TONE=TIM1
 
 [env:STM32F103VE_ZM3E4V2_USB]
-platform             = ${ZONESTAR_ZM3E.platform}
 extends              = ZONESTAR_ZM3E
 board                = genericSTM32F103VE
 board_build.variant  = MARLIN_F103Vx
diff --git a/ini/stm32f4.ini b/ini/stm32f4.ini
index d7c80cf0e9..1c3d9a8892 100644
--- a/ini/stm32f4.ini
+++ b/ini/stm32f4.ini
@@ -23,7 +23,6 @@
 # ARMED (STM32)
 #
 [env:ARMED]
-platform      = ${common_stm32.platform}
 extends       = common_stm32
 board         = armed_v1
 build_flags   = ${common_stm32.build_flags}
@@ -34,7 +33,6 @@ build_flags   = ${common_stm32.build_flags}
 # 'STEVAL-3DP001V1' STM32F401VE board - https://www.st.com/en/evaluation-tools/steval-3dp001v1.html
 #
 [env:STM32F401VE_STEVAL]
-platform          = ${common_stm32.platform}
 extends           = stm32_variant
 board             = marlin_STEVAL_STM32F401VE
 build_flags       = ${stm32_variant.build_flags}
@@ -45,7 +43,6 @@ build_flags       = ${stm32_variant.build_flags}
 # STM32F401RC
 #
 [env:FYSETC_CHEETAH_V20]
-platform           = ${common_stm32.platform}
 extends            = stm32_variant
 board              = marlin_FYSETC_CHEETAH_V20
 board_build.offset = 0x8000
@@ -55,7 +52,6 @@ build_flags        = ${stm32_variant.build_flags} -DSTM32F401xC
 # FLYF407ZG
 #
 [env:FLYF407ZG]
-platform            = ${common_stm32.platform}
 extends             = stm32_variant
 board               = marlin_STM32F407ZGT6
 board_build.variant = MARLIN_FLY_F407ZG
@@ -66,7 +62,6 @@ upload_protocol     = dfu
 # FYSETC S6 (STM32F446RET6 ARM Cortex-M4)
 #
 [env:FYSETC_S6]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = marlin_fysetc_s6
 board_build.offset          = 0x10000
@@ -80,7 +75,6 @@ upload_command              = dfu-util -a 0 -s 0x08010000:leave -D "$SOURCE"
 # FYSETC S6 new bootloader
 #
 [env:FYSETC_S6_8000]
-platform                    = ${common_stm32.platform}
 extends                     = env:FYSETC_S6
 board                       = marlin_fysetc_s6
 board_build.offset          = 0x8000
@@ -93,7 +87,6 @@ upload_command              = dfu-util -a 0 -s 0x08008000:leave -D "$SOURCE"
 # Shield - https://github.com/jmz52/Hardware
 #
 [env:STM32F407VE_black]
-platform          = ${common_stm32.platform}
 extends           = stm32_variant
 board             = marlin_blackSTM32F407VET6
 build_flags       = ${stm32_variant.build_flags}
@@ -103,7 +96,6 @@ build_flags       = ${stm32_variant.build_flags}
 # STM32F407VET6 Index Mobo Rev 03
 #
 [env:Index_Mobo_Rev03]
-platform          = ${common_stm32.platform}
 extends           = stm32_variant
 board             = marlin_index_mobo_rev03
 build_flags       = ${stm32_variant.build_flags}
@@ -117,7 +109,6 @@ extra_scripts     = ${stm32_variant.extra_scripts}
 # Comment out board_build.offset = 0x10000 if you don't plan to use OpenBLT/flashing directly to 0x08000000.
 #
 [env:Anet_ET4_OpenBLT]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = marlin_STM32F407VGT6_CCM
 board_build.variant         = MARLIN_F4x7Vx
@@ -137,7 +128,6 @@ upload_protocol             = jlink
 # BigTreeTech SKR Pro (STM32F407ZGT6 ARM Cortex-M4)
 #
 [env:BIGTREE_SKR_PRO]
-platform           = ${common_stm32.platform}
 extends            = stm32_variant
 board              = marlin_BigTree_SKR_Pro
 board_build.offset = 0x8000
@@ -149,7 +139,6 @@ upload_protocol    = stlink
 # BigTreeTech SKR Pro (STM32F407ZGT6 ARM Cortex-M4) with USB Flash Drive Support
 #
 [env:BIGTREE_SKR_PRO_usb_flash_drive]
-platform          = ${common_stm32.platform}
 extends           = env:BIGTREE_SKR_PRO
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${stm_flash_drive.build_flags} -DSTM32F407_5ZX
@@ -159,7 +148,6 @@ build_unflags     = ${env:BIGTREE_SKR_PRO.build_unflags} -DUSBCON -DUSBD_USE_CDC
 # BigTreeTech E3 RRF (STM32F407VGT6 ARM Cortex-M4)
 #
 [env:BIGTREE_E3_RRF]
-platform            = ${common_stm32.platform}
 extends             = stm32_variant
 board               = marlin_STM32F407VGT6_CCM
 board_build.variant = MARLIN_BIGTREE_E3_RRF
@@ -173,7 +161,6 @@ build_flags         = ${stm32_variant.build_flags}
 # Bigtreetech GTR V1.0 (STM32F407IGT6 ARM Cortex-M4)
 #
 [env:BIGTREE_GTR_V1_0]
-platform           = ${common_stm32.platform}
 extends            = stm32_variant
 board              = marlin_BigTree_GTR_v1
 board_build.offset = 0x8000
@@ -183,7 +170,6 @@ build_flags        = ${stm32_variant.build_flags} -DSTM32F407IX
 # Bigtreetech GTR V1.0 (STM32F407IGT6 ARM Cortex-M4) with USB Flash Drive Support
 #
 [env:BIGTREE_GTR_V1_0_usb_flash_drive]
-platform          = ${common_stm32.platform}
 extends           = env:BIGTREE_GTR_V1_0
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${stm_flash_drive.build_flags} -DSTM32F407IX
@@ -193,7 +179,6 @@ build_unflags     = ${env:BIGTREE_GTR_V1_0.build_unflags} -DUSBCON -DUSBD_USE_CD
 # BigTreeTech BTT002 V1.0 (STM32F407VGT6 ARM Cortex-M4)
 #
 [env:BIGTREE_BTT002]
-platform           = ${common_stm32.platform}
 extends            = stm32_variant
 board              = marlin_BigTree_BTT002
 board_build.offset = 0x8000
@@ -208,7 +193,6 @@ build_flags        = ${stm32_variant.build_flags}
 # BigTreeTech BTT002 V1.x with 512k of flash (STM32F407VET6 ARM Cortex-M4)
 #
 [env:BIGTREE_BTT002_VET6]
-platform          = ${env:BIGTREE_BTT002.platform}
 extends           = env:BIGTREE_BTT002
 board             = marlin_BigTree_BTT002_VET6
 
@@ -216,7 +200,6 @@ board             = marlin_BigTree_BTT002_VET6
 # BigTreeTech SKR V2.0 (STM32F407VGT6 ARM Cortex-M4) with USB Flash Drive Support
 #
 [env:BIGTREE_SKR_2]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 platform_packages           = ${stm_flash_drive.platform_packages}
 board                       = marlin_STM32F407VGT6_CCM
@@ -234,13 +217,11 @@ upload_protocol             = stlink
 # BigTreeTech SKR V2.0 (STM32F407VGT6 ARM Cortex-M4) with USB Media Share Support
 #
 [env:BIGTREE_SKR_2_USB]
-platform          = ${common_stm32.platform}
 extends           = env:BIGTREE_SKR_2
 build_flags       = ${env:BIGTREE_SKR_2.build_flags} -DUSBD_USE_CDC_MSC
 build_unflags     = ${env:BIGTREE_SKR_2.build_unflags} -DUSBD_USE_CDC
 
 [env:BIGTREE_SKR_2_USB_debug]
-platform          = ${common_stm32.platform}
 extends           = env:BIGTREE_SKR_2_USB
 build_flags       = ${env:BIGTREE_SKR_2_USB.build_flags} -O0
 build_unflags     = ${env:BIGTREE_SKR_2_USB.build_unflags} -Os -NDEBUG
@@ -249,7 +230,6 @@ build_unflags     = ${env:BIGTREE_SKR_2_USB.build_unflags} -Os -NDEBUG
 # Bigtreetech SKR V2.0 F429 (STM32F429VGT6 ARM Cortex-M4) with USB Flash Drive Support
 #
 [env:BIGTREE_SKR_2_F429]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 platform_packages           = ${stm_flash_drive.platform_packages}
 board                       = marlin_STM32F429VGT6
@@ -267,13 +247,11 @@ upload_protocol             = stlink
 # BigTreeTech SKR V2.0 F429 (STM32F429VGT6 ARM Cortex-M4) with USB Media Share Support
 #
 [env:BIGTREE_SKR_2_F429_USB]
-platform          = ${common_stm32.platform}
 extends           = env:BIGTREE_SKR_2_F429
 build_flags       = ${env:BIGTREE_SKR_2_F429.build_flags} -DUSBD_USE_CDC_MSC
 build_unflags     = ${env:BIGTREE_SKR_2_F429.build_unflags} -DUSBD_USE_CDC
 
 [env:BIGTREE_SKR_2_F429_USB_debug]
-platform          = ${common_stm32.platform}
 extends           = env:BIGTREE_SKR_2_F429_USB
 build_flags       = ${env:BIGTREE_SKR_2_F429_USB.build_flags} -O0
 build_unflags     = ${env:BIGTREE_SKR_2_F429_USB.build_unflags} -Os -NDEBUG
@@ -282,7 +260,6 @@ build_unflags     = ${env:BIGTREE_SKR_2_F429_USB.build_unflags} -Os -NDEBUG
 # BigTreeTech Octopus V1.0/1.1 / Octopus Pro V1.0 (STM32F446ZET6 ARM Cortex-M4)
 #
 [env:BIGTREE_OCTOPUS_V1]
-platform           = ${common_stm32.platform}
 extends            = stm32_variant
 board              = marlin_BigTree_Octopus_v1
 board_build.offset = 0x8000
@@ -293,7 +270,6 @@ build_flags        = ${stm32_variant.build_flags}
 # BigTreeTech Octopus V1.0/1.1 / Octopus Pro V1.0 (STM32F446ZET6 ARM Cortex-M4) with USB Flash Drive Support
 #
 [env:BIGTREE_OCTOPUS_V1_USB]
-platform          = ${common_stm32.platform}
 extends           = env:BIGTREE_OCTOPUS_V1
 platform_packages = ${stm_flash_drive.platform_packages}
 build_unflags     = -DUSBD_USE_CDC
@@ -307,7 +283,6 @@ build_flags       = ${stm_flash_drive.build_flags}
 # BigTreeTech Octopus Pro V1.0 (STM32F429ZGT6 ARM Cortex-M4)
 #
 [env:BIGTREE_OCTOPUS_PRO_V1_F429]
-platform           = ${common_stm32.platform}
 extends            = stm32_variant
 board              = marlin_BigTree_Octopus_Pro_v1_F429
 board_build.offset = 0x8000
@@ -318,7 +293,6 @@ build_flags        = ${stm32_variant.build_flags}
 # BigTreeTech Octopus Pro V1.0 (STM32F429ZGT6 ARM Cortex-M4) with USB Flash Drive Support
 #
 [env:BIGTREE_OCTOPUS_PRO_V1_F429_USB]
-platform          = ${common_stm32.platform}
 extends           = env:BIGTREE_OCTOPUS_PRO_V1_F429
 platform_packages = ${stm_flash_drive.platform_packages}
 build_unflags     = -DUSBD_USE_CDC
@@ -332,7 +306,6 @@ build_flags       = ${stm_flash_drive.build_flags}
 # Lerdge base
 #
 [lerdge_common]
-platform            = ${common_stm32.platform}
 extends             = stm32_variant
 board               = marlin_STM32F407ZGT6
 board_build.variant = MARLIN_LERDGE
@@ -349,7 +322,6 @@ extra_scripts       = ${common_stm32.extra_scripts}
 # Lerdge X (STM32F407VE)
 #
 [env:LERDGEX]
-platform            = ${lerdge_common.platform}
 extends             = lerdge_common
 board_build.encrypt = Lerdge_X_firmware_force.bin
 
@@ -357,7 +329,6 @@ board_build.encrypt = Lerdge_X_firmware_force.bin
 # Lerdge X with USB Flash Drive Support
 #
 [env:LERDGEX_usb_flash_drive]
-platform          = ${env:LERDGEX.platform}
 extends           = env:LERDGEX
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${stm_flash_drive.build_flags} ${lerdge_common.build_flags}
@@ -366,7 +337,6 @@ build_flags       = ${stm_flash_drive.build_flags} ${lerdge_common.build_flags}
 # Lerdge S (STM32F407ZG)
 #
 [env:LERDGES]
-platform            = ${lerdge_common.platform}
 extends             = lerdge_common
 board_build.encrypt = Lerdge_firmware_force.bin
 
@@ -374,7 +344,6 @@ board_build.encrypt = Lerdge_firmware_force.bin
 # Lerdge S with USB Flash Drive Support
 #
 [env:LERDGES_usb_flash_drive]
-platform          = ${env:LERDGES.platform}
 extends           = env:LERDGES
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${stm_flash_drive.build_flags} ${lerdge_common.build_flags}
@@ -383,7 +352,6 @@ build_flags       = ${stm_flash_drive.build_flags} ${lerdge_common.build_flags}
 # Lerdge K (STM32F407ZG)
 #
 [env:LERDGEK]
-platform            = ${lerdge_common.platform}
 extends             = lerdge_common
 board_build.encrypt = Lerdge_K_firmware_force.bin
 build_flags         = ${lerdge_common.build_flags} -DLERDGEK
@@ -392,7 +360,6 @@ build_flags         = ${lerdge_common.build_flags} -DLERDGEK
 # Lerdge K with USB Flash Drive Support
 #
 [env:LERDGEK_usb_flash_drive]
-platform          = ${env:LERDGEK.platform}
 extends           = env:LERDGEK
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${stm_flash_drive.build_flags} ${lerdge_common.build_flags}
@@ -401,7 +368,6 @@ build_flags       = ${stm_flash_drive.build_flags} ${lerdge_common.build_flags}
 # RUMBA32
 #
 [env:rumba32]
-platform             = ${common_stm32.platform}
 extends              = stm32_variant
 board                = rumba32_f446ve
 board_build.variant  = MARLIN_F446VE
@@ -418,7 +384,6 @@ upload_protocol      = dfu
 # MKS Robin Pro V2
 #
 [env:mks_robin_pro2]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 platform_packages           = ${stm_flash_drive.platform_packages}
 board                       = genericSTM32F407VET6
@@ -440,7 +405,6 @@ build_flags = -DPIN_WIRE_SCL=PB6 -DPIN_WIRE_SDA=PB7
 # MKS Robin Nano V3
 #
 [env:mks_robin_nano_v3]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = marlin_STM32F407VGT6_CCM
 board_build.variant         = MARLIN_F4x7Vx
@@ -457,7 +421,6 @@ upload_protocol             = jlink
 # Currently, using a STM32duino fork, until USB Host get merged
 #
 [env:mks_robin_nano_v3_usb_flash_drive]
-platform          = ${common_stm32.platform}
 extends           = env:mks_robin_nano_v3
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${stm_flash_drive.build_flags} ${stm32f4_I2C1.build_flags}
@@ -471,7 +434,6 @@ build_flags       = ${stm_flash_drive.build_flags} ${stm32f4_I2C1.build_flags}
 # Currently, using a STM32duino fork, until USB Host and USB Device MSC get merged
 #
 [env:mks_robin_nano_v3_usb_flash_drive_msc]
-platform          = ${common_stm32.platform}
 extends           = env:mks_robin_nano_v3_usb_flash_drive
 build_flags       = ${env:mks_robin_nano_v3_usb_flash_drive.build_flags}
                     -DUSBD_USE_CDC_MSC
@@ -482,7 +444,6 @@ build_unflags     = -DUSBD_USE_CDC
 # 5 TMC2209 uart mode on board
 #
 [env:mks_eagle]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = marlin_STM32F407VGT6_CCM
 board_build.variant         = MARLIN_F4x7Vx
@@ -500,7 +461,6 @@ upload_protocol             = jlink
 # Currently, using a STM32duino fork, until USB Host get merged
 #
 [env:mks_eagle_usb_flash_drive]
-platform          = ${common_stm32.platform}
 extends           = env:mks_eagle
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${stm_flash_drive.build_flags} ${stm32f4_I2C1.build_flags}
@@ -514,7 +474,6 @@ build_flags       = ${stm_flash_drive.build_flags} ${stm32f4_I2C1.build_flags}
 # Currently, using a STM32duino fork, until USB Host and USB Device MSC get merged
 #
 [env:mks_eagle_usb_flash_drive_msc]
-platform          = ${common_stm32.platform}
 extends           = env:mks_eagle_usb_flash_drive
 build_flags       = ${env:mks_eagle_usb_flash_drive.build_flags}
                     -DUSBD_USE_CDC_MSC
@@ -530,7 +489,6 @@ build_flags = -DPIN_WIRE_SCL=PB8 -DPIN_WIRE_SDA=PB9
 # MKS Monster8
 #
 [env:mks_monster8]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = marlin_STM32F407VGT6_CCM
 board_build.variant         = MARLIN_F4x7Vx
@@ -548,7 +506,6 @@ upload_protocol             = jlink
 # Currently, using a STM32duino fork, until USB Host get merged
 #
 [env:mks_monster8_usb_flash_drive]
-platform          = ${common_stm32.platform}
 extends           = env:mks_monster8
 platform_packages = ${stm_flash_drive.platform_packages}
 build_flags       = ${stm_flash_drive.build_flags} ${stm32f4_I2C1_CAN.build_flags}
@@ -562,7 +519,6 @@ build_flags       = ${stm_flash_drive.build_flags} ${stm32f4_I2C1_CAN.build_flag
 # Currently, using a STM32duino fork, until USB Host and USB Device MSC get merged
 #
 [env:mks_monster8_usb_flash_drive_msc]
-platform          = ${common_stm32.platform}
 extends           = env:mks_monster8_usb_flash_drive
 build_flags       = ${env:mks_monster8_usb_flash_drive.build_flags}
                     -DUSBD_USE_CDC_MSC
@@ -572,7 +528,6 @@ build_unflags     = -DUSBD_USE_CDC
 # TH3D EZBoard v2.0 (STM32F405RGT6 ARM Cortex-M4)
 #
 [env:TH3D_EZBoard_V2]
-platform            = ${common_stm32.platform}
 extends             = stm32_variant
 board               = genericSTM32F405RG
 board_build.variant = MARLIN_TH3D_EZBOARD_V2
@@ -588,7 +543,6 @@ upload_protocol     = stlink
 #  - MKS Robin Nano-S V1.3 (STM32F407VET6) 4 TMC2225 + 1 Pololu Plug
 #
 [env:mks_robin_nano_v1_3_f4]
-platform                    = ${common_stm32.platform}
 extends                     = stm32_variant
 board                       = marlin_STM32F407VGT6_CCM
 board_build.variant         = MARLIN_F4x7Vx
@@ -610,7 +564,6 @@ upload_protocol             = jlink
 # Artillery Ruby
 #
 [env:Artillery_Ruby]
-platform          = ${common_stm32.platform}
 extends           = common_stm32
 board             = marlin_Artillery_Ruby
 build_flags       = ${common_stm32.build_flags}
diff --git a/ini/stm32f7.ini b/ini/stm32f7.ini
index 200740589b..62755c846d 100644
--- a/ini/stm32f7.ini
+++ b/ini/stm32f7.ini
@@ -25,7 +25,6 @@
 # being readily available based on STM32F7 MCUs
 #
 [env:NUCLEO_F767ZI]
-platform      = ${common_stm32.platform}
 extends       = common_stm32
 board         = nucleo_f767zi
 build_flags   = ${common_stm32.build_flags} -DTIMER_SERIAL=TIM9
@@ -34,6 +33,5 @@ build_flags   = ${common_stm32.build_flags} -DTIMER_SERIAL=TIM9
 # REMRAM_V1
 #
 [env:REMRAM_V1]
-platform      = ${common_stm32.platform}
 extends       = common_stm32
 board         = remram_v1
diff --git a/ini/stm32g0.ini b/ini/stm32g0.ini
index 99f167a4df..171945ffe2 100644
--- a/ini/stm32g0.ini
+++ b/ini/stm32g0.ini
@@ -23,17 +23,17 @@
 # BigTree SKR mini E3 V3.0 (STM32G0B1RET6 ARM Cortex-M0+)
 #
 [env:STM32G0B1RE_btt]
-platform          = ststm32@~14.1.0
-platform_packages = framework-arduinoststm32@https://github.com/stm32duino/Arduino_Core_STM32/archive/main.zip
-extends            = stm32_variant
-board              = marlin_STM32G0B1RE
+extends                     = stm32_variant
+platform                    = ststm32@~14.1.0
+platform_packages           = framework-arduinoststm32@https://github.com/stm32duino/Arduino_Core_STM32/archive/main.zip
+board                       = marlin_STM32G0B1RE
 board_build.offset          = 0x2000
 board_upload.offset_address = 0x08002000
-build_flags        = ${stm32_variant.build_flags}
-                   -DADC_RESOLUTION=12
-                   -DPIN_SERIAL4_RX=PC_11 -DPIN_SERIAL4_TX=PC_10
-                   -DSERIAL_RX_BUFFER_SIZE=1024 -DSERIAL_TX_BUFFER_SIZE=1024
-                   -DTIMER_SERVO=TIM3 -DTIMER_TONE=TIM4
-                   -DSTEP_TIMER_IRQ_PRIO=0
-upload_protocol   = stlink
-debug_tool        = stlink
+build_flags                 = ${stm32_variant.build_flags}
+                            -DADC_RESOLUTION=12
+                            -DPIN_SERIAL4_RX=PC_11 -DPIN_SERIAL4_TX=PC_10
+                            -DSERIAL_RX_BUFFER_SIZE=1024 -DSERIAL_TX_BUFFER_SIZE=1024
+                            -DTIMER_SERVO=TIM3 -DTIMER_TONE=TIM4
+                            -DSTEP_TIMER_IRQ_PRIO=0
+upload_protocol             = stlink
+debug_tool                  = stlink
diff --git a/ini/stm32h7.ini b/ini/stm32h7.ini
index 16d1067e52..b0cb10866c 100644
--- a/ini/stm32h7.ini
+++ b/ini/stm32h7.ini
@@ -23,7 +23,6 @@
 # BigTreeTech SKR SE BX (STM32H743IIT6 ARM Cortex-M7)
 #
 [env:BTT_SKR_SE_BX]
-platform           = ${common_stm32.platform}
 extends            = stm32_variant
 platform_packages  = framework-arduinoststm32@https://github.com/thisiskeithb/Arduino_Core_STM32/archive/biqu-bx-workaround.zip
 board              = marlin_BTT_SKR_SE_BX
diff --git a/ini/teensy.ini b/ini/teensy.ini
index f3e5fd0260..ab0617b5b7 100644
--- a/ini/teensy.ini
+++ b/ini/teensy.ini
@@ -9,61 +9,72 @@
 #                               #
 #################################
 
+#
+# Teensy AVR
+#
+[teensy_avr]
+platform          = teensy
+platform_packages = toolchain-atmelavr@~1.70300.0
+extends           = common_avr8
+lib_ignore        = ${env:common_avr8.lib_ignore}, NativeEthernet
+
 #
 # AT90USB1286 boards using CDC bootloader
 # e.g., BRAINWAVE, BRAINWAVE_PRO, SAV_MKI, TEENSYLU
 #
 [env:at90usb1286_cdc]
-platform   = teensy
-extends    = common_avr8
+extends    = teensy_avr
 board      = marlin_at90usb1286
-lib_ignore = ${env:common_avr8.lib_ignore}, Teensy_ADC, NativeEthernet
+lib_ignore = ${teensy_avr.lib_ignore}, Teensy_ADC
 
 #
 # AT90USB1286 boards using DFU bootloader
 # e.g., Printrboard, Printrboard Rev.F, 5DPRINT
 #
 [env:at90usb1286_dfu]
-platform = teensy
-extends  = env:at90usb1286_cdc
+extends = env:at90usb1286_cdc
 
 #
 # Teensy++ 2.0
 #
 [env:teensy20]
-platform   = teensy
-extends    = common_avr8
-board      = teensy2pp
-lib_ignore = ${env:common_avr8.lib_ignore}, NativeEthernet
+extends = teensy_avr
+board   = teensy2pp
+
+#
+# Teensy 3.x - 4.x
+#
+[teensy_arm]
+platform   = teensy@~4.12.0
+src_filter = ${common.default_src_filter}
+lib_ignore = NativeEthernet
 
 #
 # Teensy 3.1 / 3.2 (ARM Cortex-M4)
 #
 [env:teensy31]
-platform      = teensy@~4.12.0
-board         = teensy31
-src_filter    = ${common.default_src_filter} +<src/HAL/TEENSY31_32>
-lib_ignore    = NativeEthernet
+extends    = teensy_arm
+board      = teensy31
+src_filter = ${teensy_arm.src_filter} +<src/HAL/TEENSY31_32>
 
 #
 # Teensy 3.5 / 3.6 (ARM Cortex-M4)
 #
 [env:teensy35]
-platform      = teensy@~4.12.0
-board         = teensy35
-src_filter    = ${common.default_src_filter} +<src/HAL/TEENSY35_36>
-lib_ignore    = NativeEthernet
+extends    = teensy_arm
+board      = teensy35
+src_filter = ${teensy_arm.src_filter} +<src/HAL/TEENSY35_36>
 
 [env:teensy36]
-platform      = teensy@~4.12.0
-board         = teensy36
-src_filter    = ${common.default_src_filter} +<src/HAL/TEENSY35_36>
-lib_ignore    = NativeEthernet
+extends    = teensy_arm
+board      = teensy36
+src_filter = ${teensy_arm.src_filter} +<src/HAL/TEENSY35_36>
 
 #
 # Teensy 4.0 / 4.1 (ARM Cortex-M7)
 #
 [env:teensy41]
-platform      = teensy@~4.12.0
-board         = teensy41
-src_filter    = ${common.default_src_filter} +<src/HAL/TEENSY40_41>
+extends    = teensy_arm
+board      = teensy41
+src_filter = ${teensy_arm.src_filter} +<src/HAL/TEENSY40_41>
+lib_ignore =