TCP and UDP don't really dictate any of this behavior. Most of these hacks are the result of design choices in Linux and the socket API - abstractions on top of

TCP and UDP don't really dictate any of this behavior. Most of these hacks are the result of design choices in Linux and the socket API - abstractions on top of TCP/UDP that aren't the only option. In my experience, the network layer is often way better-designed, more reliable, more interoperable, and less hacky than most OS abstractions built on top of it.