Little to no monetary benefit, hardware changes now need to be documented for Linux, loudest and most critical users but smallest volume.
Go team Asahi!
A 1-3% of the market out of the 5% that Linux already is, is little to no monetary benefit?
EDIT: I now see what you said: I meant 1-3 percentage points out of the 5%, but I am sure you actually know that.
Apple's MO is that it's their baby. End of. They don't do open. Their compiler is closed source, and so on.