I'm working for a browser-based app for electronic musicians to jam together online (not real-time, I think I found a compromise)
Funny how I didn't anticipate that the biggest obstacles to launching it will be my own mind, in the form of imposter syndrome and insecurity. That, and the lockdowns have been a bit rough. Almost there though, and a lot of lessons learned. I assume there's probably some more lessons in actually getting the first users coming up next, but I'll cross that bridge when I get there I guess :)