IPv6 is the standard way to preserve end-to-end connectivity when IPv4 NAT breaks it.

You're free to see these as orthogonal problems, but if enough people think as you do (moving IPv4 to NAT without first deploying IPv6), then the Internet as we know it is dead.

Why do you say that? They're converging with the way the rest of the world* does things.

*Consumer, and Enterprises in the US

Not if you're selling your IPv4.