[IgorPartola]

Why isn’t it a nice thing? And SCTP and UDP clearly provide different semantics. I am fine with experimenting with new protocols on top of UDP because it is simple to do but ultimately I think things like SCTP and QUIC should run directly on top of IP.

[tptacek]

No. SCTP provides a superset of UDP's semantics. Every IP protocol does, because UDP doesn't do anything except multiplex raw IP.