[xg15]

I think there is some value in having a (relatively) small number of transport-level protocols with known semantics.

If every web page would effectively reinvent their own transport-level protocol* including subtly different connection handling, congestion behavior and drop/reorder tolerance, that sounds like it would make life a nightmare for all network intermediaries.

(* I know the transport-level protocol is technically UDP but that doesn't count because all he practically relevant aspects are defined on top of it)

Also, ICE etc solves a real problem - that users of Web UDP would have to deal with as well. Why demand that everyone reinvents the solution for themselves if we can include a standard solution in the browsers for everyone?