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Re:Working Group Last Call: QUIC protocol drafts by jlouis on Wednesday June 10, 2020 @12:57PM (#23479324)
UDP is as clean as you can get it. It is more or less free of any overhead. And networks know UDP already. A new IP protocol is far more likely to be rejected in the network.
Re:Working Group Last Call: QUIC protocol drafts by tptacek on Wednesday June 10, 2020 @04:18PM (#23481583)
This, exactly; it's the actual reason UDP exists. It's a design smell for anything to ask for a new IP protocol number.