I believe Google Analytics without enhanced tracking is a net benefit. The information on how many users visit and how they use the site is incredibly helpful. The problem with Google Analytics is that Google tracks are lot more than they need to and use it for their own benefit as well. Safari seems to mostly prevent that now.
The IP address & user-agent combination alone is enough to track a home user (whose IP doesn't change that often) with a high degree of accuracy, and even more so if you happen to be logged into a Google account in another tab/browser which will allow them to attribute any new IPs to you.
I was saying that being logged-in in one tab would let Google know of any new IP that you would be using, which would in turn allow them to attribute non-logged-in traffic from other tabs because they now know your new IP.
That’s too bad. Wish apple had the guts to stand up and do the right thing for end-users.