xscreensaver of course! Note that this is not an option on Windows---jwz hates Microsoft, and any xscreensaver port to Windows is against his wishes.
I use yabai and sketchybar for a tiling WM feel. It's nowhere as nice as my preferred i3, but it's ok. Unfortunately it often breaks with major OS updates, so I'm sure to hold back updating my system until yabai is working.
IIRC sshfs will work on macOS but it's more work to install. Worth it if allowed by your IT policies and your work can benefit from it.
Vim, tmux, and the usual *NIX stuff you might want.
The coreutils are not the GNU coreutils you typically find on a Linux system, so you may find a few differences. I believe sed is slightly different, and the flags for ls must be before the filename arguments, but I've found it's mostly silly stuff like that (I used zsh before using macOS, so no problem there).
I used Photoprism years ago, so my knowledge is probably pretty outdated.
My experience of Photoprism was that mobile was not tightly integrated. At the time I used Syncthing to sync photos
it worked ok for me, but I wasn't going to set it up on my partner's phone, for example.
Immich Just Works on both mobile and desktop. Multi user is great, sharing is great, and the local ML and face detection work remarkably well.
Whatever works for you is the best of course! Immich fits the bill for me, and it was very much worth it for me to "buy" it.