Will this support the Index?
Headset? Yes. Via SteamVR ATM. I implemented OpenXR support which is available in the preview builds.
Controllers? They used to work. But recently I got one person who had some issues with sliding locomotion (which is a feature coming soon to public builds).
Before I make it a public build, I am going to dig up my HTV Vive + prototype Index controllers to check if everything works.