I don't agree either, and in fact, NAT is awful it breaks core functionality of the internet. I am old enough to remember the days when everyone had a unique IP

I don't agree either, and in fact, NAT is awful it breaks core functionality of the internet. I am old enough to remember the days when everyone had a unique IP address and things like FTP and all the rest would "just work". Now you have to have all sorts of elaborate mechanisms like STUN, etc. to find a third server to coordinate handshaking so video chat can work, sometimes necessary to be relayed through the third server instead of directly between the two clients.