NAT is a minor nuisance for protocol design and most games have exactly zero problems with NATs. I think games are actually one of those things where NATs are r

NAT is a minor nuisance for protocol design and most games have exactly zero problems with NATs. I think games are actually one of those things where NATs are really not a big issue, because the high packet rate will never produce timeout issues. SIP is a different story, but SIP (and it seems all other VoIP stacks as well) are mindboggingly problematic in every way imagineable, so NAT is a problem but NAT is definitely not your only problem with VoIP. (I consider VoIP hugely impressive for turning what literally was "connect two wires, polarity doesn't really matter" with a debugging experience of "if you don't hear the tone, the wire is broken" and a reliability of "it works" into "well you need a fully-loaded computer connected to the internet running an insane software stack with more compatibility hacks than your unsightly mother" with a debugging experience of "well f---" and a reliability of "I'm just going to use my cellphone, whose battery life is literally less than one day")