> I mention this because one of the things that's missing from your education about the OSI Model is that it originally envisioned everyone writing to applicati

> I mention this because one of the things that's missing from your education about the OSI Model is that it originally envisioned everyone writing to application layer (7) APIs instead of transport layer (4) APIs. There was supposed to be things like application service elements that would handling things like file transfer and messaging in a standard way for different applications. I think people are increasingly moving to that model, especially driven by Google with go, QUIC, protobufs, and so on. HTTP/3 aka QUIC driven by Go & protobufs ? ;))))