Same reason I miss those library cards found in the back of books. I enjoyed seeing the history a book had, how years could pass without anyone checking it out or seeing a flurry of checkouts.

https://news.ycombinator.com/item?id=49022152#:~:text=Same%20reason%20I%20miss%20those%20library%20cards%20found%20in%20the%20back%20of%20books.%20I%20enjoyed%20seeing%20the%20history%20a%20book%20had%2C%20how%20years%20could%20pass%20without%20anyone%20checking%20it%20out%20or%20seeing%20a%20flurry%20of%20checkouts.