>The effect being to derail most F/OSS HTTP libs, web servers, and TCP/IP stacks due to sheer complexity and conflicting goals.

If you're trying to imply HTTP/2 and HTTP/3 have this goal, then I am glad you are not writing any HTTP libraries. I am sick and tired of everyone rolling their own shoddy, incomplete HTTP/1.1 libraries with string splitting and regex. I safely assume any HTTP library that does not support at least HTTP/2 is exactly this.

I'm glad the "complexity" of HTTP/2 and HTTP/3 means less people are trying to make a half-assed implementation. By the time you get to actually sending stuff with HTTP/3, you'll be deep enough that you won't just forget the whole 3xx series of response codes.