[redmajor12]

It's still basically another mac address or unique identifier for the system, regardless of which local network it happens to be on. Great for being tracked by FAANG, I guess, but I'd rather for my devices use a generic local IP and a randomized mac. There's no reason why the refrigerator needs to be uniquely identifiable on the Internet.

[Dagger2]

No, v6 addresses are assigned by (or chosen based on) the current network, not permanently associated with a given system. They aren't MAC addresses or unique identifiers.