Another thought: I too check up on old friends and classmates. It brings things into sharp focus when I find one that has passed – some in their 30s and 40s. I can still hear their voice in my head, but they are gone.
As soon as I pass and their other friends and family pass, even those memories are gone.
A couple of years ago I reconnected with a guy I hung out with in high school. He stayed local to where we met while I’ve been all over. He passed away about 3 months ago and his daughter sent out a FB request for any photos anyone had of her father so they could be shared at his memorial. I sent her photos from high school and a trip he took with me to northern California. She was thrilled! She could hardly believe her father ever did the things in those photos. She learned another side of him that she would have never known otherwise.