Thanks Moin, this is exactly right. @gormus the only place that the actual group IDs come through still is in the admin UI for the theme settings.
Not sure if this is clear based on what I’ve posted before, but the anonymous_users and logged_in_users are usable at any time without this upcoming change being enabled, I added them independently months ago. This is the main thing the upcoming change does:
So either way, you are safe if you get rid of everyone everywhere it’s used and only use anonymous_users and logged_in_users from now on.
Today I plan to figure out a plan of the remaining work I need to do to truly get rid of everyone for site settings (leaving category settings alone at the moment), and I will post it here, so hopefully that will help stay on the same page going forward, and I can keep updating this plan as I go.