Can confirm, it’s sort of prototype-y at the moment. I’m the one who commented on that page that you could pull it out of a Marketplace install, and build it yourself… and it… works? after fixing many errors. But for what it does, spending an hour or more at startup on a fairly sizeable commercial project, isn’t really the way. I think all it does is provide code-lens support that shows how many/what blueprints inherit from a specific code class. It’s… useful… but it’s not that useful. Although I really dislike Rider, Rider’s implementation of that works better. A LOT better.
I suspect Microsoft will get it there, though. And especially if they open source it, there’s probably a lot of really cool things that could be done . . . although I haven’t thought of them yet.