> Well... yeah? That's adding support for both stacks; just because you farmed it out to a middle-man doesn't mean that it's not there.

Not strictly true. It means that you only have to worry about IPv6 addresses in Layer 7, and you can forget about layers 2 and 3 altogether.

And Layer 7 isn’t a problem for people who should be deploying IPv6 right now because https://ipv6bingo.com/