https://tidbits.com/2021/05/27/an-m1-mac-cant-boot-from-an-external-drive-if-its-internal-drive-is-dead/ https://tidbits.com/2021/05/27/an-m1-mac-cant-boot-from

https://tidbits.com/2021/05/27/an-m1-mac-cant-boot-from-an-external-drive-if-its-internal-drive-is-dead/ https://tidbits.com/2021/05/27/an-m1-mac-cant-boot-from-an-e... I don't see any reports but there is evidence that should the soldered on SSD fail the entire device is borked short of board level repair.