30 years on and if I have a machine with an ipv6 only network and run

"ping 1.1.1.1"

it doesn't work.

If stacks had moved to ipv6 only, and the OS and network library do the translation of existing ipv4, I think things would have moved faster. Every few months I try out my ipv6 only network and inevitably something fails and I'm back to my ipv4 only network (as I don't see the benefit of dual-stack, just the headaches)

Sure you'd need a 64 gateway, but then that can be the same device that does your current 44 natting.

This works if you have 464xlat turned on. It's mostly used by phones though.