I'm super excited for this! But it makes me curious.

What's the process like for getting such a low-level primitive added to Linux? Especially a low-level primitive that 1) exist basically just to emulate behavior of a completely different kernel, and 2) is only needed for a subset of users to play games?

I'm not complaining, just curious. I would assume a patch to add the above would be heavily scrutinized. Is it because the popularity of the Steam Deck / proton?