Right now I have my daily workflow apps open, but no project files, and I'm using 16GB RAM on a 64GB Mac Studio.I'm still undecided. I've watched a lot of online reviews and the general consensus among reviewers is that neither the 16 GB Mac Mini or the 24 inch iMac is powerful enough if you are serious about photography and have a lot of pictures to restore or correct. But that assessment isn't universal, some say that either the iMac or the Mini is more than enough for 'pro-sumer' level work. At this point Im going to wait and see how the M2 version of the Mac Mini, which is rumored to be coming out this year, or at least announced, is reviewed by online mac-centered photo reviewers.
Thanks for letting me know what you did, and how you think it is working out. If WWDC announces new M2 chips and specs that will probably go a long way to pushing me into a decision, unless they won't be available this year. From what I am hearing online the 24 inch iMac is probably NOT going to see an upgrade to the M2. But the rumors haven't been terribly accurate lately about what Apple is about to release.
308 MB - Safari
750 MB - forums.macrumors.com (this page)
215 MB - Mail
101 MB - Messages
940 MB - Photoshop - no images open yet
520 MB - Premier - no projects open yet
660 MB - After Effects - no projects open yet
The rest of the RAM is used by Adobe background services and macOS (spotlight, dock, etc...).