This sounds like the problem is the term "best-effort" (hand wavy, what's the measure of effort? What's "the best" effort?). In the end, best-effort is just sa

This sounds like the problem is the term "best-effort" (hand wavy, what's the measure of effort? What's "the best" effort?). In the end, best-effort is just saying "unreliable" in a fussier way. >But it does not make UDP inherently unreliable. Isn't that exactly what it does make it? If that's not it, then what woud an actual "inherently unreliable" design for such a protocol be? Calling an RNG to randomly decide whether to send the next packet?