Videogames on Library Shelves
What you fail to realize is that a collection of books is just as transient. Titles don't go into a library collection and stay there forever.
the book your tax dollars financed ten years ago served it's purpose and is probably gone now. This is especially true with popular fiction titles. More sholarly books tend to stick around, but generally, books that were popular 10 years ago don't get read now. so they go away to make room for what the public wants NOW. The same will be true with the console games.