> They’re obviously doing recommendations based on IP address. (And this is purely over ipv4). I have IPv6 at home and connect to Youtube over IPv6 (that's gen

> They’re obviously doing recommendations based on IP address. (And this is purely over ipv4). I have IPv6 at home and connect to Youtube over IPv6 (that's generally the default behaviour on macOS and many other OSes). I reboot my DSL modem-router every night and get a new IPv4 address and new IPv6 prefix every day. Now: I live in Ontario, and my ISP is based in Ontario, but they serve clients in Quebec. Every so often, when surfing Youtube, I get served ads in French because according to my (IPv6) address I am "in" Quebec. And, while I am not logged into any Google service, I do not block cookies. So even with cookies, Youtube seems to be fairly dumb about serving ads correctly just based on IP addresses (or at least IPv6 addresses and/or IPv6 prefixes), since cookies don't seem to be useful. So I'm not quite sure about what people are talking about when they say "IPv6 tracking" if even Google/Youtube can't get their act together.