This is… very unexpected. A Foss application releasing it’s VR variant exclusive to a completely proprietary platform. This will be great for people who specifically have the quest 3 or pro, but all other VR enthusiasts and tinkerers like myself, must hope that this gets a pcvr OpenXR release soon.
For anyone who wants to try a similar thing: One could use something like WlxOverlay (or maybe even SteamVR proprietary overlay) to achieve a very similar workflow. There one too could make live changes to the game while also being in-game.