> I still don’t fully understand why more people don’t use them over something like QUIC Dealing with NAT traversal especially with full-cone NATs is difficult

> I still don’t fully understand why more people don’t use them over something like QUIC Dealing with NAT traversal especially with full-cone NATs is difficult and expensive - you have to maintain dedicated infrastructure of TURN servers for NAT and you have to proxy all your traffic through that, it's quite the overhead, especially since IPv4 addresses and bandwidth on AWS don't come cheap.