I built a small VR demo for the website I have been developing and it is ready to share. The project uses instances and node materials liberally, and plays music over VR. It has been tested on Quest 2.
Big thanks to @Evgeni_Popov for helping me to get the material graphs and tree shaking working.
Let me know what you think, and please try it on an immersive VR display if you have one available.