It's true. Counterpoint: if you move places a lot (let's say if you happen to belong to a generation of people who will never be able to afford a place - which is a huge amount of people), your library needs to fit into a small tablet sized reader. Can store 5000 books, I do not have the means to move that amount of books every time my landlord decides to make my rent more unaffordable. An ereader fits in my pocket.