I actually get higher FPS in graphically demanding games due to vulkan producing more optimized shaders, most of the lag actually comes from context switching and translation for directx, it's absolutely GREAT one dx12 due to how little translation there is.

I'm currently working on few very targeted optimizations for several hotspots I've found out from messing around so it will be interesting if I can solve those horrible stutter issues on cyberpunk since if I can fix it (in a ghetto and janky way), so can valve.

I can also achieve higher fps in games like overwatch (dx12) out of the box on nvidia on proton experimental which is surprising as 4 years ago the input latency was unbearable and I had drops as low as 30 fps, now I can achieve consistent 600 fps with minimums of 450 whereas on windows I get as low as 220fps and averages of 500ish. I do have anticheat related drops to <300fps due to the amount of translation happens when they decide to scan memory, registry and whatnot although it lasts <1s and doesn't happen during games it seems.