Picking specifically on the claim that IPv6 doesn't degrade user privacy. In an IPv4 + NAT overload residential network, google can see 10 different accounts l

Picking specifically on the claim that IPv6 doesn't degrade user privacy. In an IPv4 + NAT overload residential network, google can see 10 different accounts logging in from a single IP address. In an IPv6 + privacy-extention-addressing residential network, google can see the unique IPv6 used for each address, and concludes that since five of these 10 accounts are coming from the same IPv6 address, and the other five are coming from five different distinct addresses. That's more than it was able to glean before. IPv6 was designed at a time when NAT was a hack to extend address space, before we had pervasive surveillance on the internet. IPv6 privacy extension addressing is a hack to try and address the fact that we now have pervasive surveillence on the internet. Privacy properties of IPv4 NAT overloading was by chance rather than by design, but tragically the IPv6 privacy extentions are worse by design, than by chance.