I’m not sure there’s a better option: too many network operators are asleep at the switch and you’ll find networks where IPv6 works but v4 is subtly broken or vice versa. Asking nicely won’t get the stragglers to upgrade so what we probably need are economic incentives: as IPv6 becomes more common, providers charging for IPv4 is a good prod.

The most important thing is probably just pushing equipment vendors to set better defaults since that’s what a disturbing number of places will be using.