> Not having a system API is the entire point of QUIC. The only reason QUIC needs to exist is because the sockets API and the system TCP stacks are too ossified

> Not having a system API is the entire point of QUIC. The only reason QUIC needs to exist is because the sockets API and the system TCP stacks are too ossified to be improved. I don't think your take is correct. The entire point if QUIC was that you could not change TCP without introducing breaking changes, not that there were system APIs for TCP. Your point is also refuted by the fact that QUIC is built over UDP. As far as I can tell there is no real impediment to provide a system API for QUIC.