I was seriously worried the various incompatibilities the M3 bootloader had with Asahi's debugging setup would mean way slower bring-up than M1 and M2 had. Seems like that wasn't the case - or, at least, won't be the case anymore.

Seems like once they got past that things weren’t too bad. Could have been way more incompatibilities waiting on the other side.

The processor version with the debugging incompstibilities was M4, I think.