le sigh

Thanks though. Your comment really cheered me up.

"I bet one _could_ accelerate IPv6 deployment a lot by have a standard ..."

ahem

https://owl.billpg.com/sixgate/

Yes. The router in your home would absolutely need to support IPv4x if you wanted to make use of the extended address space, just like how in the real world your home router needs to support NAT if you want to make use of shared IP.

My point is that we're still dependent on IPv4. For all the progress IPv6 has made, no-one is willing to switch IPv4 off yet. Until we do, we're still constrained by all the problems IPv4 has.

Until you would happily deploy a service on IPv6 only, I suggest that you're still dependent on IPv4.