> Why is the idea of a "book" tied so closely to the physical medium it is printed on? Maybe because until some 15 years ago, physical books/magazines/newspape

> Why is the idea of a "book" tied so closely to the physical medium it is printed on? Maybe because until some 15 years ago, physical books/magazines/newspapers have been _the_ medium that people had been using to consume the vast majority of written texts over centuries, from their very childhood to old age. Doesn't surprise me at all.