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.
They could have made a VR version of the engine that runs in all the same places but shows the editor using OpenXR. It would work with fully open source setups like Monado, but also on compliant android headsets and steamVR.
EDIT: After reading the article, I realized that this is better replicated by something like wlx-overlay and is replicating desktop style VR development on a mobile platform. Would have liked to see it work on HTC and Pico headsets as well though.
Monado is for SteamVR which isn’t FOSS either.