[1] https://www.mckinsey.com/capabilities/growth-marketing-and-s...
[2] https://www.forbes.com/sites/theyec/2022/09/12/the-slow-deat...
[3] https://blog.hubspot.com/marketing/third-party-cookie-phase-...
[4] https://www.marketingweek.com/death-third-party-cookies-goog...
[5] https://www.techtarget.com/whatis/feature/The-death-of-third...
Since none of your links provided any evidence for this, I'm going to guess that the waste swathe of material doesn't actually exist.
Moving that tracking directly into the browser seems like a cheap attempt at trying to bypass the GDPR.