Google Just Disabled Cookies for 30M Chrome Users

Just a cut and paste when I submit.

Yes, they do have something better. It's a cutting edge technology - "disable cookies for everyone but enable them for google.com"

Better for who?

For Google - that's privacy sandbox.

Oh, definitely not "only cookies intended to track users". This applies (IIANM) to e.g. any browser storage within an iframe. That is, if you want to have an SSO cookie on some login.auth.example and want to open the login form in an iframe, bad luck. The iframe cannot store or access the SSO cookie (or any other, like various preferences). And it's even worse (IIANM; I'm not yet sure if today's specific step applies this widely, but the whole "third-party tracking protection" definitely do): the foreign-origin iframe cannot use _any_ kind of storage, no localStorage, no sessionStorage, nothing. Not even for the time the iframe is active (no tracking there!). We are nowhere near the ad/tracking business but still need to handle these issues. (Not like we expect this to change, so we need to implement other solutions, usually much more complicated and less user-friendly.)