Yes and no. With limited IPv4, many places have dynamic IPv4 in a way or another, or have IPv4 behind some sort of NAT, so the actual IP of the accessing devic

Yes and no. With limited IPv4, many places have dynamic IPv4 in a way or another, or have IPv4 behind some sort of NAT, so the actual IP of the accessing device may be hidden, or are private addresses. Anyway, that doesn't mean that i.e. your ISP couldn't be asked what person was using certain dynamic IP at some time. With IPv6 it depends on implementation. Your device may have a public IPv6 address, persistent or not, and you don't need to be behind some sort of NAT (unless it is something to access ipv4 addresses), so if a lot of those conditions apply you might be tracked. But there is a lot of conditionals in both sides, and the elephant in the room is that you are tracked for more things than just your IP address.