I vaguely remember hearing about an artist who, I think this was about 15 years, scavenged a bunch of the oldest camera phones they could find (i.e., flip and candy bar phones) and, because no one ever resets their electronics, pulled all the photos they held. I didn't actually see how they displayed the pics (giant collage? coffee table book?), but I thought it sounded interesting from historical perspective. I'll bet it's a lot like nowadays except for the quantity since those phones predated constant cloud-connections. That is to say, mostly kids, SOs, and cats.