In my purely anecdotal experience over the last few years, performance ranking is as follows: 1. Steam on Linux via Proton + Wayland (Niri) 2. Steam on Linux via Proton + X11 (Xfce) 3. Steam on Windows 4. Games on Linux launched via other means (it's possible I was missing out on certain flags/optimizations, but this is just about the average experience) The biggest thing I noticed when switching to Linux was an impr…
If you use ZFS (single nvme) then you can beat windows load times by a fairly large margin. My husband and I have identical hardware for our gaming computers (he uses Windows and I run Linux), it's not uncommon for my computer to load games 10 seconds faster than his.