Comment by summerlight

> Which is weird since apple did that like three years ago? Just no one cared much since it was Safari.

Because Apple is not running competing ad network. Their only ad network is running on their own app store. Apple does not get any competitive benefits from 3p cookie deprecation for its ad networks.

> The linked document is about _replacing_ 3pc,not simply eliminating them, which seems a crucial distinction.

I don't know why you're getting the impression that the doc is only about replacing 3pc, but Google which tried to remove 3p cookies drew significant attentions from competing ad network and eventually antitrust regulatories. I know this since some of my work closely depends on this timeline.