Recent testing revealed that Arch Linux, Pop!_OS, and even Nobara Linux, which is maintained by a single developer, all outstripped Windows for the performance crown on Windows-native games. The testing was run at the high-end of quality settings, and Valve's Proton was used to run Windows games on Linux.
Causes don’t matter. Only the reality. Incompatiblies and crappy lows will keep adoption low.
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Hell, nVidia was actively working against having a working opensource driver reverse engineered by Nouveau. Linux is a thorn in their side and the only reason they somewhat support it today is that GPU compute works so much better on Linux.