[jnxx]

That's very generous. However, with the plethora of browser fingerprinting techniques, cookies today have become almost irrelevant:

https://coveryourtracks.eff.org/

https://scrapebot.com/browser-fingerprinting-techniques/

[creata]

Regardless of how simple fingerprinting is, I'm pretty sure that cookies are still the main way in which advertisers track users. Why make their job cheaper than it has to be?

[jnxx]

I agree. What I wanted to point out is that this is not intended as a privacy-enhancing move by Google. More that they make life a bit harder for their own competitors.