[llukas]

What becomes harder and harder?

Asahi seems to do just fine and has good pace with adding feature support. https://asahilinux.org/

M2 is similar to M1 so it is easier as there is less HW combinations in the wild.

[askvictor]

It becomes harder every time apple makes a change to something. GPU, bootloader, some secondary processor in charge or some obscure but surprisingly important thing. The whole thing is dependent on Apple deciding not to disallow it for now.