Comment by nostrademons

I've also found triple stores to have terrible performance, but it looks like the intended use-case for this (like Firebase) is rapid development, prototyping, and startups. You aren't going to generate enough traffic when you're building an MVP for this to be an issue.

And it's a hosted service, so the performance issues are for the InstantDB team to worry about, and they can fold it into the price they charge. It does mean that your application architecture will get locked in to something that costs a fortune in server bills when it gets big, but from InstantDB's POV, that's a feature not a bug. From your POV as a startup it may be a feature as well, since if you get to that point you'll like have VC to blow on server bills or use to rewrite your backend.