Exclusively social (although I expect that to change).

Probably about the same but I think my experience on it has improved.

I think super testnet has the right idea in thinking about nostr relays as generic public use servers. I’d love to see more commonplace applications use this truly “serverless” approach.

Abstractly, I think it’s mostly the experience someone has when they don’t know many people on nostr or have much of an online following themselves. There are lots of technical things to nitpick, but I tend to think the performance parts of that are solvable if the community grinds on them enough.