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

-d is required if you’re on an lts until .1. If you’re on mantic you should be able to upgrade without it

In another country where this wasn’t relevant perhaps?

Yeah I think that’s exactly his point. Every browser prompts you to make it default, it’s not exactly a complex change.

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

There’s not a good enough™ one. Genuinely that’s the biggest thing I miss using Firefox over chrome