KDE Plasma Wayland, I'm using it for gaming mainly and occasionally for VR.
Pros:
supports DRM leasing mandatory for wired VR headsets
supports tearing (also in windowed apps but requires an additional setting) which reduces input latency in games
usually all the new fancy features, ex. HDR, appear quickly
decent support for fractional scaling (handy on laptops)
Cons:
you might encounter bugs. While Plasma 6 has been a much better experience as opposed to older versions of it, there are still some bugs here and there appearing between the updates. As of this writing thought I can't recall any bugs on my system.
Nope, it's not just you. EasyEffects' UI is very buggy and unintuitive.
If you have some will to tinker around, you could set up Carla with your chosen VST, VST3 etc. effects. You can also use Yabridge to translate Windows VST effects with Wine, this way you could use ex. FabFilter's (somewhat expensive and proprietary) plugins in Carla.
You can play the mod on any SteamVR compatible headset, including the very first HTC Vive, the Oculus Rift CV1 and many others. You don't need an Index to play it
Steam Deck runs an embedded session of Gamescope which uses DRM (no not copy protection) to display games.
Running Gamescope as a launch command will run it in a nested session, where it's output is being sent to your display manager, ex. Kwin. That's where the lag can happen, and usually does especially in GPU bound scenarios
Issue not necessarily appearing on the Steam Deck but it would benefit from it as well - better handling of mixed input from a controller and mouse. I have a Steam Controller and prefer to have it simulate a controller in FPS games but to have the right touchpad work as a virtual mouse to ignore in-game acceleration curves and deadzones.
Some games handle it well, like Cyberpunk 2077, some games like Grounded tend to show keyboard prompts whenever it would detect mouse input but still function correctly.
If I'm not mistaken Borderlands 2 would drop it's UI controller layout whenever a mouse input was detected, which can probably be skipped by using layout switching/overrides from Steam Input.
The worst offender so far is Hunt Showdown, where the game freezes for 0.5 s when it detects mouse input, even if it's a physical mouse input.
All of my testing has been conducted on Linux, not sure how it behaves on Windows
KDE Plasma Wayland, I'm using it for gaming mainly and occasionally for VR.
Pros:
Cons: