I used to be in charge of the drawing storage at our company. We had about 7 decades of drawings stashed away in several dozen cabinets and a whole wall of a building full of tubes from floor to ceiling. I don't know which was worse- trying to roll old drawings tight enough to get into the tubes or opening up a cabinet and having a bunch of drawings fall down into it. The vellum drawings were dirty and stunk but at least they didn't get worn out and tear like old paper. PDFs changed all that.