First of all, if you look up Ebook library licensing fee, you'll see the crazy clusterfuck of ridiculous charges, so it's no where near "zero marginal cost". It

First of all, if you look up Ebook library licensing fee, you'll see the crazy clusterfuck of ridiculous charges, so it's no where near "zero marginal cost". It should be, but it isn't. Secondly, speaking as someone who is fully on-board on ebooks, for some books, such as large reference books, design/photography books and children books, physical books are still the way to go. Plus extended reading on a tiny mobile phone is not feasible for many people, and not everyone can afford a large screen device for reading.