WebSockets have head-of-line blocking.

HTTP/2 does not.

But surely it does? It is TCP, even with multiplexing

I thought that was the whole motivation for building HTTP/3 on QUIC (UDP)?

	▲	paulddraper 14 minutes ago \| parent [-]
		Well, yes. There is always some form of it on TCP. But your HTTP/2 reverse proxy won't block fast responses on slow responses. As long as your WebSocket reverse proxy does the same, you're fine. (And same stipulation for your client.)