The really sad thing about this though is that "the internet" no longer works for stuff which isn't TCP. I guess it does, but not for your whole target market.

The lowest common denominator is users behind an NTLM proxy. Mass market products don't generally work unless they have a fallback which is "I can make it tunnel through proxies". Which is HTTP or CONNECT :( Which means no teams will do something which isn't TCP anymore, since it's not a thing they can tunnel :( Interested in counterexamples though.

This is the same reason why a UDP replacement is a great idea but a waste of time for most people developing a product. This makes me sad.