At my house with about 10 online devices now i have 42 ipv6 entries in the nat table out of 272 total. I have at&T adsl but would see similar results with Comcast business (which i had until a month ago). I have either linux or newish commercial devices and they have slipped ipv6 in over the past few years. no more HE tunnels for me. I suspect if more websites put it in the DNS it would just work. I am just waiting for ipv6 only VPCs in AWS.