We have legal deposit in France too, and it has nothing to do with copyright, it's just to keep records. And then they store the books in that big ugly building they built for this, except nobody bothered to check the requirements to store books apparently, so they made this building with glass walls, and then realized they had to protect the books from the sun, so they made wood panels to obscure the windows, thereby making the building even uglier than it was originally.
Maybe they can use all that space to store e-books, light won't hurt them.
