[wombarly]

Websites are moving towards providing md5/sha1/sha256 hashes of your normalized email (stripping the + from gmail) or phone number to advertisers.

A basically permanent ID. Unified ID2 is one version of this.

The 3rd party cookie ban and heavy pushback against alternative solutions suggested by Google just pushed advertisers into going an even worse route privacy wise.

[IshKebab]

Yes and this was pointed out on pretty much every thread about this, but it was always drowned out by the extremists. Most people on HN are extremists in this case.