panic-itm is used at run time in 6 crates (of which 3 optionally). It's used only as a dev dependency in 14 crates.

Depender (with downloads and own rev deps) panic-itm version
stm32f407g-disc ^0.4.2
ross-firmware ^0.4.2
ross-bootloader ^0.4.2
libdaisy optional ~0.4.2
mwatch-kernel-stm32l4 optional ^0.4.0
polymer optional ^0.4.1
12K 15 stm32h7xx-hal dev ~0.4.1
1.1K 32 stm32f1xx-hal dev ^0.4.2
1.1K xmc4-hal dev ^0.4.2
270 nucleo-h7xx dev ^0.4.2
240 1 stm32f3-discovery dev ^0.4.2
240 1 stm32g4xx-hal dev ^0.4.2
2 stm32f1xx-hal-bxcan dev ^0.4.1
1 aemics-stm32g4xx-hal dev ^0.4.2
stm32h7-fmc dev ^0.4.1
grove-matrix-led-my9221-rs dev ^0.4.2
stm32h7-sdmmc dev ^0.4.1
gd32f1x0-hal dev ^0.4.2
stm32g473-hal_oppe dev ^0.4.2
daisy_bsp dev ^0.4.2