> NAT, for all its problems, has more or less solved the IP address problem. This is only kind of true if you can fit your network completely into the RFC1918

> NAT, for all its problems, has more or less solved the IP address problem. This is only kind of true if you can fit your network completely into the RFC1918 space (which many large companies, for example, can not). Again, given the aggressiveness many of the providers, like Verizon, have taken in their IPv6 roll-out, including internally, and given how much of a complete mess NAT is at scale (with CGN and statefulness), I am personally dubious that IPv4 has the capability to carry us much further forward.