I've bought one of every major M1 model for testing purposes and have done all kinds of crazy things to them, and the only time something weird happened was with the original firmware version where I managed to break recovery mode by messing with diskutil, but I was able to fix it from macOS without requiring a DFU flash. It's never happened again and I've done the same thing dozens of times, so I think that was some silly bug in the shipping firmware version that has long since been fixed. I never actually had to resort to DFU recovery (though I still tested it a bunch as part of improving support for it in idevicerestore).