"WebXR Device API is a Web application programming interface (API)[1][2] that describes support for accessing augmented reality and virtual reality devices, such as the HTC Vive, Oculus Rift, Oculus Quest, Google Cardboard, HoloLens, Apple Vision Pro, Magic Leap or Open Source Virtual Reality (OSVR), in a web browser."
In your experience, does the promise hold true, is WebXR really "write once run anywhere" for the VR space?