I actually think this is less true than it used to be; the problem now is mainly on the server side. A substantial fraction of US residential customers can get

I actually think this is less true than it used to be; the problem now is mainly on the server side. A substantial fraction of US residential customers can get IPv6 access as long as their network equipment supports it. But aside from a few prominent names -- like Google, Wikipedia, and Facebook -- the vast majority of the internet is only accessible if you have a v4 address. From the latest statistics I could find, about 7-8% of Google visitors are connecting via IPv6 [1], but only about 1% of the Alexa top 10,000 sites are v6-enabled. [2] [1]: https://www.google.com/intl/en/ipv6/statistics.html https://www.google.com/intl/en/ipv6/statistics.html [2]: https://www.vyncke.org/ipv6status/allgreen.php https://www.vyncke.org/ipv6status/allgreen.php