I’m watching Joanna Stern's interview with Craig and I’m left wondering: What good is hiding the IDFA now if you’d EVER used an app or service before?

If you’ve logged in with an IDFA, that service simply has to keep a database entry that says, “Was once IDFA 2204786” and it happily continues to watch and share. 

It’s like an old phone number. Maybe I don’t have a number any more, but if I used it in App X and App Y last year, if I log into App X today and do anything, X can still share with Y with high confidence that it’s me doing that activity today. 

https://drive.google.com/uc?export=view&id=1NVXflYUQ-A80grTYZc2TiB2wsbme9VoA

You’re still going to know I was looking at that shirt unless I create brand new logins everywhere!!1!

Look, that’s not a reason not to hide that softball connection now, but it’s going to help tomorrow’s iOS users a lot more than today’s. The cat’s already out the bag, the horse out of the barn, the chicken has flown the coup. 

Our privacy is already shot. You’re welcome, later generations. 

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