Oculus already has a great library of exclusives and more AAA games out soon.
If I get a Rift-S I can play them + anything on Steam without issues.

If I get an Index I have Steam. Revive lets me play some Oculus games and by reading the Github page it pretty unreliable. And then what if the Revive dev abandons the project? 

So is the Index really that much better than a Rift-S to justify its price and library issues? I'm not really interested in VRchat so body tracking isn't an interest.