I am autodidactic. Therefore I see libraries as a basic education need.
It's not practical to have 100's of reference books and texts, but if I've got access to a good library I can juxtapose several references and texts in a way that digital technologies can't emulate.
Some libraries use wonderful classification systems such as Bliss, which really appeals to me for the way it seemingly shelves books on different subjects according to the kind of thinking thats gone into them.