I use it, mostly because I wanted to build an analogue to Google Drive/Photos, though it took some work to get it to a point where it felt good. Since the default Photos app feels pretty garbage to me, I installed the Memories app (same thing but better, very like Google photos) as well as Preview Generator & Recognize.
These seem to do the trick. The automated tagging isn't without its issues (pretty janky, frankly), but I'm pretty content with it to the point where I'm not looking to change in a hurry. Haven't tried Immich, though it looks pretty enough like I'd probably just go with it since it does the one task it's supposed to do, but again, I'm comfy and don't feel the need to find a new home for my photos yet.