This article is very odd, it frames the change as a third-party/tracking change when it is in fact a (very effective) solution against CSRF attacks. Sites that want to track you with third party cookies can simply set SameSite to None and that's that.

This change is 100% for sites that got their cookies sent from other sites by mistake.

More (and accurate) information here: https://www.owasp.org/index.php/SameSite