> - Having it in user space means there’a a good chance we’ll end up with 100s of implementations, all with their own quirks. It’s bad enough trying to optimise

> - Having it in user space means there’a a good chance we’ll end up with 100s of implementations, all with their own quirks. It’s bad enough trying to optimise for the three big TCP stacks. Big QUIC implementors have all used the interop runner, intended to prevent exactly that: https://interop.seemann.io/ https://interop.seemann.io/ And it’s open source: https://github.com/marten-seemann/quic-interop-runner https://github.com/marten-seemann/quic-interop-runner