It’s not an emulator it’s an abstraction layer for the DirectX API etc. They’re similar in ways but not quite the same.

As for the difference in native support, well actually having such a later might mean longer support. Some older native games may not run well on future systems as libraries and the kernel change, whereas so long as proton runs, the older games should continue to work.

Proton also adds functionality that wasn’t really in the native Windows, i.e. superior suspend and certain input mapping features.

Interesting. I have similar issues but it’s with streaming the game from PC to Deck etc. It will start to stutter and lag out, but if I turn off the device for a moment then back on it’ll reconnect and be fine thereafter

I dunno about Proton but I’d assume do. I have some CAD and 3D software I use in Wine.