For better or worse, Google is very explicitly not a card catalog though. One might disagree about how Google determines relevance--and the criteria are opaque. But, in any case, it's quite different from a card catalog which, with the caveat that the work in question must be part of the library's curated collection, is completely non-judgmental about the relative importance of a given item.
I guess no one at Google is getting a promotion by making sure old pages can be returned.