I use Google Photo's image recognition all the time. I wish it was 1000x better but it's still amazing.

I uploaded about 120k photos including all my father's photos I had scanned. (about 4000)

I injured my toe when I was 10yrs old. Searched in my Google photos "toes". Found the picture pretty quickly. Have had similar success finding pictures of my childhood dogs. Can also search by people (face recognition).

It's still got a long way to go but I love it when it works.