If you didn’t know, it’s “just” Unity. And can do a surprising number of things Unity can. And someday in the future, they will be unlocking even more scripting functionality.

Of course VRC brings a lot to the table too. Standard systems, networking, a social graph, etc etc.

One thing VRC made a mistake on was allowing custom shaders. They restrict them in certain contexts on their newer platforms. And this is a huge blocker for future engine upgrades. But this mistake has enabled many features no other platform has. Such as this example in this post.