I simrace in VR which is an incredibly immersive experience. I bought an HP Reverb G2 headset in 2021 which uses Windows Mixed Reality - fair enough, I thought, it's a Microsoft product, so it shouldn't become obsolete too soon (foreshadowing warning).
SteamVR works with the headset but performance was a bit subpar, possibly as it uses core Windows components (including the DWM for compositing); after installing the WMR drivers I then fell down the rabbit hole to optimise performance using OpenXR, OXR Toolkit and OpenComposite community fixes to improve frame pacing and foveated rendering...
Eventually I got to a really nice setup where everything just worked well, stable framerates and no reprojection at 90 Hz.
But then...