Not a fan of the sentence-long idiom of java names but for sure plenty of great software has been written in Java, and as a gopher I like it that the language has static type respecting interfaces, which I think are a lot better than templates (I'm pretty handy with code generators).

Nostr needs some kind of captcha scheme to weed out some of the spam, it's one thing that it seems to me that it will need protection against once the crowds show up and the weeds come to spam and scam. Especially paid relays, who have an obligation to their customers to not be bogged down with garbage in between paid work.