Generally I think all of us should keep about 5% of our photos, in any format, and toss the rest.
But back in the early 90s in Wyoming, our neighbors sneaked away in the middle of the night to avoid landlords and late rent. Most of their stuff was in the rental and the landlords told the rest of us to take what we wanted. So it was free day for everybody. The saddest thing was seeing the baby pictures lying on the floor in the dirt.