My experience on my own home network is that ~80% of wan traffic is v6-native, ~19% is using dns64/nat64, and ~1% is ipv4-native. This is for 5 people in the US. The 1% includes all of the (internet-bound) traffic from all devices that don’t support v6 at all, and all traffic from sockets which don’t respect dns64. I’m not using ipv6-only/mostly, just enabling dns64 in parallel with dual stack. So much of the traffic goes to streaming services. So very much traffic. Andrew