That last iPhoto update killed my album, and I've lost a shit tonne of photos and videos. And I couldn't even use my backups either because when I open then up, they too needed to read the entire album to do facial recognition etc... took a few days for each backup, but I only knew photos/videos were gone after all drives had been "updated".

One of these days, I'll plan on writing my own photo management system, with recoverable indexing, optional facial scanning, and zero phoning home.