I have mixed feelings about this. On the one hand, I agree: text is infinitely versatile, indexable, durable, etc. But, after discovering Bret Victor's work[1], and thinking about how I learned piano, I've also started to see a lot of the limitations of text. When I learned piano, I always had a live feedback loop: play a note, and hear how it sounds, and every week I had a teacher coach me. This is a completely diff…
What separates text from images is that text is symbolic while images are visceral or feelings based. In the same way, text comes in short when it comes to the feeling you get when seeing an image. Try to put in to text what you feel when you look at Norman Rockwell's Freedom of Speech or a crappy 0.5MB picture of your daughter taken on an iPhone 3. Hard isn't it? Visual and symbolic are not isomorphic systems.
Examples of symbolic systems like text are sheet music and Feynman diagrams. You would be hard pressed if you tried to convey even 2KB of sheet music in a book