[ivankolev]

Yes, trade-offs all the way down :) Physical damage of the nature you described affects many forms of digital storage too, though I doubt vermins will find them very palatable. And there could be many copies of a book, to your second point. There is also the question of the specialized equipment needed to read the digital media. As I said, trade offs. I try to maintain a personal book library just because I was an avid reader growing up, in the pre-internet days, and I don't want to see the future generations go pure digital, but maybe it is inevitable.