link-local is mandatory for ipv6 to work. Technically everybody you have ever seen is using it. It is unlikely that you know somebody without a cellphone. And as far as I know, all cellphone networks are ipv6 first.

https://en.wikipedia.org/wiki/Link-local_address#IPv6

Did you reply to the wrong comment? I know link-local works in IPV6, we were discussing IPv4.