Just remember that now instead of your ISP knowing every site you visit, Apple now will.

So where as in the olden days, in order to figure out who you were, some actor had to buy logs from the destination sites and from the ISPs, then correlate.

Now they can just buy the information from Apple. How convenient for Apple.

I know Apple says they will only share your information with trusted partners and only with your consent which is implicit when you use private relay. No one ever asks who these partners are though. Probably the same people that used to buy your data from the destination sites and ISPs...