The short answer is in many cases it’s just not worth it. Maintaining a Linux build is not free and the possible market share gain is fairly minimal. Add to that the possibility you get it for free through proton and your reasons for investing the dev effort shrink.

I’ve heard an argument for maintaining Linux builds because Linux users will provide better bug reports but that mindset is unlikely to ever survive in a big studio

In another country where this wasn’t relevant perhaps?

Why do I want an alternative to tmux? Like what’s your favorite thing it gives you?

Thank you for this! I completely missed this and have 2 stadia controllers on a shelf right now