I've become the family tree historian of the family and I found it EXTREMELY helpful to digitize all of the photos (a major task, I know) and upload them to my google photos. Google photos is really smart about face matching, even across drastic age differences, and people in photos that I didn't recognize before, I realized who they were only after the face match suggestion was made by google photos. It's not a perfect system by any means, but I have been able to identify way more people by doing this.