User-space apps have a lot more avenues for timely updates than middleboxes or kernel-space implementations do though, and developers have lots of experience wi

User-space apps have a lot more avenues for timely updates than middleboxes or kernel-space implementations do though, and developers have lots of experience with it. If middleboxes actually received timely updates and bugfixes, there would be no ossification in the first place, and a lot of other experiments would have panned out much better, much sooner than QUIC has (e.g. TCP Fast Open might not have been DOA.) There's also a lot of work on interop testing for QUIC implementations; I think new implementations are strongly encouraged to join the effort: https://interop.seemann.io/ https://interop.seemann.io/