Good story, but there's one thing missing: Safari on iOS does not block 3rd party cookies by default. It blocks them until you interact with a 3rd party element

Good story, but there's one thing missing: Safari on iOS does not block 3rd party cookies by default. It blocks them until you interact with a 3rd party element on the site. Then it accepts them. And Google exploited that by faking an interaction with a 3rd party element. This "3rd party cookie only on interaction" is a setting that most desktop browsers don't have. You can either accept or deny 3rd party cookies. So, in that regard Safari on iOS is different than the rest. But I'd argue that it's a very sane default setting and I hope that normal browsers everywhere start adding this setting too. I'd use it!