I mean, not over the wire, but an average developer can definitely grok either protocol pretty quickly. IP is connectionless and fairly simple. TCP requires a m

I mean, not over the wire, but an average developer can definitely grok either protocol pretty quickly. IP is connectionless and fairly simple. TCP requires a more complicated state machine, and has more extensions if you want to implement the entire thing. IPv6 makes both more complicated. But the actual functionality is limited, so there's not a lot of complexity outside of "Did they turn on option 1? Do a thing. Did they turn on option 2? Do another thing. Is option 2 on but option 3 off? Do another thing." It's not like implementing transport encryption and multiplexing and congestion control and etc etc etc. I doubt many people in the world actually know how to implement QUIC. I implemented tcp/ip as a teenager when I was bored over summer break.