Considering that we are pretty much going digital now these types of repositories will become invaluable in a few hundred years if not earlier. Thankfully a lot

Considering that we are pretty much going digital now these types of repositories will become invaluable in a few hundred years if not earlier. Thankfully a lot of people love their books and will not dispose of them even if they could digitize them. So even if a book could not be found in a repository there is a good chance that somebody around the world will own a copy.