One of the big problems of electronic gadgets in general and e-books as a replacement for textbooks in particular is their reliability.
Paper textbook from the party will fall, what will happen to him? In the worst case, a couple of pages will break, but they can be glued.
And the electronic book? Luckily - will survive, not lucky - buy a new one.
How long does an electronic book last?

Okay, we remember that children love to get angry, fight backpacks and so on. Will the electronics withstand it? Were you kids in your childhood?

You need to buy protected equipment. and durable. Which, accordingly, is more expensive. Sometimes several times. Will her battery fall out?

The horror of our electronic age is that the most reliable medium of information is still paper.