People you know or knew die off.
I typed in the name of my best friend in grammar school and most of high school and up popped a loving tribute obituary. She passed away in February 2021 at the age of 84! We had some really great times growing up. I saw her at our 25th reunion. We exchanged info and took turns having dinner at each other's homes. Decades passed and a couple of years ago we met again and met for breakfast and spent a few hours catching up.
So that's the downside. The upside is the memories of other times.
Ever done that? "Looked up" folks you used to know?