Think this way: postgress db is just part of immich. That’s it - separate your services into logical units.

That’s actually makes more sense to do at home lab. Bringing down your main DB breaks a lot of your services. By separating - only part would be broken.

My postgress db lives in the same docker compose file where immich is. If I decide to delete immich - it’s very simple to run “docker compose down” and delete folders. :)