Running Linux is already not very straight forward on modern x86 Apple hardware, it would be extremely surprised to see the ARM Apple running Linux anytime soon.
It'll happen, eventually, when the open source community will reverse engineer them and find how to "jailbreak" them.
Then we still have to deal with drivers; I don't see mesa supporting the A12 GPU anytime soon, for instance. I think this is the end of the line for Linux on Macs.
It'll happen, eventually, when the open source community will reverse engineer them and find how to "jailbreak" them.