It was. I have searched long for a similar program (mainly face recognition) and couldn't find one. Github is full of POC for that, but nothing in a "complete" package.

I tried Digikam, but their face eh recognition discovered also lots of non-faces. The UI also was not fun to use. You click on a suggestion and it takes several seconds before you could type either the name, or pick one. All that with a relatively small collection (2TB).

I, too, am currently discovering that it is a bit too slow. Too bad, I would very much like a Picasa replacement.