This is very nice, it reminds me a bit of aether.app which I think has been abandoned (though it's open source so anyone could fork it).

I think it would be very valuable if you could create subthreads on each thread. Right now you have a huge blank space besides the chat which just doesn't make much sense.

I love the design of the app, feels old school but very nice. It's also very fast. I couldn't find the source code though, is it a proprietary platform? I know it's not decentralised so that's a bit disappointing. But looks good!