That's not sad at all! One of my retirement plans is finally getting my library into one specifically-planned room. I fantasize about its future design the way most people fantasize about - well, whatever they fantasize about.
My fantasy is based on the library at the Lutheran Seminary in Germantown, Philadelphia, PA, where I've gone to do genealogical research. The building is of stone, like a cathedral. There are enormous windows that go from the roof almost to the ground. The interior is essentially a cavernous space within which the floors and bookshelves are an integrated steel structure, with the floor tiles made of glass to let the light through from one floor to the next. There are also fluorescent lights, but for a multi-story library, the amount of natural light is extraordinary.
It also has an impressive, circular, stone atrium where they put choice texts and historical documents on display. Furthermore, the staff is enormously knowledgeable and eager to help.