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Arch and other Linux operating systems Beat Windows 11 in Gaming Benchmarks
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
I think the impact of Proton is negligible nowadays. It's basically just an implementation of a library the game uses. If it wasn't Win32 it could be another library like SDL. The normal game logic is usually done in something nearer to the CPU anyways, which will be the same regardless of OS. And if the game uses Vulkan instead of Direct3D the graphics are also running almost directly on the GPU.
The real force multiplier we could see is when game engine devs push optimizations upstream, which is just something you can't do on windows.
Or with nVidia. For now.
You're probably right.