Not so much networking protocols but WebRTC maybe? I did a hello world type of implementation of WEBRTC awhile back and it made perfect sense to me.

Yeah there's the WebRTC you can hack in an afternoon and there's the WebRTC that covers the most common edge cases. The problem that the solution to one problem (for example your websocket going disconnecting mid call while WebRTC still soldiers on) can create three new problems when a different edge case arises.