This is an understatement. It is completely impossible to even attempt to install Linux at all on an M3 or M4, and AFAIK there have been no public reports of any progress or anyone working on it. (Maybe there are people working on it, I don’t know).
Sounds like the GPU architecture changed significantly with M3. With M4 and M5, the technique for efficiently reverse-engineering drivers using a hypervisor no longer works.
Thanks, I guess I stand corrected.
> There are screenshots of an M3 machine running Linux and playing DOOM at around 31:34 here
That is encouraging! Still, there is no way for a normal to user to try to install it, unless something changed very recently.