I agree. I use syncthing for syncing phones and laptops. For data like photos, which aren't really updated. It works very nice. And for documents updated by one user, moving between devices is totally seamless.
That being said i understand how it works at a high level.
I've switched from photoprism to immich. Immich is a much more active project, bugs are fixed, face recognition is an order of magnitude better, just an overall more solid experience. If you are choosing, I wouldn't doubt for a second to go with immich.
That being said i understand how it works at a high level.