Earlier quoted context omitted.
No, nobody is interested in de-anonymising, it’s not useful. To target, say a car ad all that is needed is to know that cookie 1234 is interested in buying a sports car, and when that cookie is encountered, serve it a sports car ad.
It's very useful for b2b people to know who is looking at your website and who might be good targets to reach out to. Knowing that Steve the SVP at Databricks is looking at your website vs cookie 1234 is a pretty key differentiator
Some companies are trying to sell you on "AI based" solutions that take deanonymization a step further, but as far as I can tell, it's mostly horseshit and wishful thinking.