How is the bootloader/peripheral compatibility on the non-SBC ARM systems these days? Can you plug in a boot disk on different machine and expect it to just work? My main problem with ARM is that many manufacturers act as if they're special little snowflakes and deserve to have their custom patched kernel/bootloader/whatever.

Software/driver compatibility and rational fear of change from users.

(My work laptop is one of the few ARM laptops: Thinkpad T14s with Quallcomm Snapdragon Elite)

Chromebooks are essentially this, but not that great for local development.