The websocket RFC is designed around TCP, and "extending" WS to work over UDP would essentially be a new protocol. Which is what this is. You can think about t

The websocket RFC is designed around TCP, and "extending" WS to work over UDP would essentially be a new protocol. Which is what this is. You can think about this with HTTP/1 vs HTTP/3: HTTP/3 isn't an extension of HTTP/1. It's radically different.