Proton leads to some bizarre behaviors though. My worst experience is on a surplus "mobile workstation" with Optimus graphics. It has a pretty robust Intel quad

Proton leads to some bizarre behaviors though. My worst experience is on a surplus "mobile workstation" with Optimus graphics. It has a pretty robust Intel quad-core and one of their better iGPUs as well as an NVIDIA Quadro M5000M which has decent VRAM and should compare almost to a GTX 1650. The packages pulled in by steam define a bunch of vulkan providers which then confuses steam. Many games won't even launch and you have to manually kill off a bunch of steam worker processes to even successfully shutdown and restart steam. You can't uninstall the package due to dependencies, so instead have to manually move/rename some files under /usr/share/vulkan/icd.d/ to only leave the one for NVIDIA. Then, games launch but have very inconsistent performance. I don't know if this is because Optimus is competing with the game for PCIe bandwidth, or something else still going awry with the driver stack.