The 545 Beta drivers apparently support a ton of new features on Linux like VRR. Frame Gen is the only thing not supported by Proton yet I think.
Tbh though, if you’re on Nvidia I would stay on Windows. It’s definitey doable to use Linux and get equal performance. Until Nvidia is ready for Wayland though I wouldn’t switch.
Good news is NVK is a new Open Source Nvidia Vulkan driver so in like a year or two things should be as good as on AMD. The driver already loads most games with DXVK 1.5.1 but runs them at like 1 FPS if they have anything like Valheim Graphics and above. Reclocking should be coming soon though so the situation will improve. After that it’s just working to get all features in and optimize.