[kemotep]

But you can do that with IPV6? I have both an IPV4 and IPV6 address on this very device.

My confusion in the claims that we could do it differently is how the protocol could be updated without actually doing the work of updating everything on the network and adding the new address scheme.

[paperplatter]

But you're still using ipv4, which cannot be upgraded in-place the way I described. I responded to a sibling comment about the second question.

[kemotep]

What makes the 4 to 5 NAT different than the current 4 to 6 NAT and DNS?

[paperplatter]

4-to-5 NAT would be effectively the same if that's what you use, but I don't see why you'd need one.