QUIC is damn good though! Its minimal header has a very tiny overhead, and the protocol gives us so much for free. What’s to lament? The userspace impl?

QUIC is indeed impressive and one of the developments that excite me.

I meant, I wish there were more application-layer protocols (like a new IRC, NNTP, rather than say Matrix or ActivityPub which is just JSON shunting over HTTP), the rest of the OSI stack gives us plenty of choice already :)