I have long felt the killer feature of QUIC is its ability to encapsulate _both_ reliable in-order delivery and unreliable datagram delivery in the same opaque-to-middleboxes container. Whereas HTTP becoming the everything-protocol is debatable, if QUIC becomes the everything-protocol we will be a lot better off. QUIC is the middlebox and censorship killer. Unfortunately that last point is its greatest weakness: censors can currently get away with blocking it.
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