Thanks for the response! My suggestion would be that if multiplayer aspects are really the key differentiator between Obsidian and your app, you should let the user see that straightaway. Maybe drop them into a shared workspace with other people or something? That could be cool.

As for the tech framing - I imagine you'll get lots of responses on that, and I'm sure it works for some people. Speaking personally, I think it irks me in particular because I feel that "React is slow" isn't really true -- but hey, we can sidestep that whole argument if you just tell me that your app loads a 100GB text file in 0.1ms or whatever :)