Games

Pain tolerance levels? The biggest pain points I have with Steam are that it's not universally DRM-free (which is why I shop GOG first) and that their multiplayer servers go down for 15 minutes during maintenance windows once or twice per week. Native Linux ports were not going to become more common prior to Proton; they were on the fast track to becoming less common, especially given how many more games are now released every year, and Proton has the added benefit of adding Linux support to games where it was just never going to feasibly happen otherwise.

While I don’t agree with that approach it kinda works but it’s not that Valve does this because they like Linux. They’re scared of losing their monopoly in case Windows changes too much.

It's both. That fear of losing their market position is exactly how a functioning market is supposed to work. Competition is supposed to come in and outdo Valve. EA looked like they were interested for a little while back when they launched Origin, but they changed their minds. Epic says they're interested now, but they only want sellers and not customers. It's not a monopoly, legally, when they attained their market position by just being better than everyone else.

There are ARM native games on Mac (Disco Elysium for example) and Steam has no issues with them.

And I wonder how many more there are out there. Because if that number is low enough, it may just not be worth it to bother. I'd imagine it's a nightmare to have to support Apple through all of their standards that they dictate at their business partners. Valve went through the trouble of making a Vulkan->Metal translation layer, since Apple refused to support open standards, and then Apple retired x64 on their machines shortly afterward.