Guide to running Cyberpunk 2077 v2.0 (with Phantom Liberty)
Install game, set runner to Proton v8.x.x or Proton Experimental
Set Launcher Options : "VKD3D_CONFIG=dxr,dxr11 PROTON_HIDE_NVIDIA_GPU=0 PROTON_ENABLE_NVAPI=1 gamemoderun %command% --intro-skip -skipStartScreen --launcher-skip --nogamepad -dx12"
Note that the commands "VKD3D_CONFIG=dxr,dxr11 PROTON_HIDE_NVIDIA_GPU=0 PROTON_ENABLE_NVAPI=1" enables Nvidia 30xx users to use Raytracing in-game, at a somewhat substantial cost to FPS.
Game feels well-optimized, i have most settings on high and max (no Raytracing), game runs smoothly at perceived >60fps.
CP2077 is absolutely a towering achievement in world building and atmosphere. Very movie-like cyberpunk and intense set-pieces. Basically Deus Ex 1 + Blade Runner on steroids.