Is this even relevant nowadays? I've been doing some tests with Edge and Firefox, and with their built-in tracking prevention + uBlock, it didn't matter whether I accepted all or only essential cookies, because at the end, only first party cookies are set.

One might argue that accepting all allows tracking by the site itself. But, does it really matter? I'm already on the site because I'm willing to. At this point, we're no longer talking about tracking but analytics.