I'd say it's pretty dang official now: https://digiday.com/marketing/cheat-sheet-google-extends-coo...

Don't forget the actions of other browser-vendors too, like Apple's Safari and Mozilla's Firefox, both of which have severely curtailed third-party cookies - and Google Chrome's Incognito mode also disables all third-party cookies.

> They just kicked the deadline forward another year or two while they test out alternatives.

Right, but the deadline still exists.