The quality of this software is overall extremely good. It is a solo-developer as well so you might want to consider sponsoring them if you end up using it.
I am not affiliated, just a happy user :)
I have a Photoprism instance running on my home server backed by a raidz1 ZFS pool (1st backup). Photos are periodically synced to a Backblaze bucket with versioning enabled (2nd backup). The source of most photos is an iOS device with iCloud enabled (main copy). I rely on PhotoSync to periodically sync from the iOS device to Photoprism.
Google photos absolutely blows me away with its ~1% false positive rate (that is, given a photo, correctly identifying with kid(s) are in it) identifying each of my kids, nieces, and nephews. I don’t really know what its false negative rate (a false negative would be an uploaded photo of John but that doesn’t get tagged as having John in it) is, though.
I can search for each of my kids and see photos of them going back to their birth.
https://github.com/LibrePhotos/librephotos
I may have missed some: https://github.com/awesome-selfhosted/awesome-selfhosted#pho...
Hence my interest in DigiKam as their management features for large collections is second to none.
MO is not addictive. It doesn't sell your data. There's no ads. MO saves photos in their original quality for free.
I'm also looking for something FOSS that can do basic face recognition + maybe even more, but last time I checked DigiKam's detection didn't work so well, or maybe I got spoiled by the detection in Google Photos. If you do give it a go, would be nice if you reported back on your experience :)