Not to mention the storage and care of 100 books in less-than-ideal housing where moisture and rodents are very real problems. Plus the actual volume of 100 some books.
Compared to a laptop, that can sit in your bag, and also serve as a light source.
It doesn't need to be a good laptop, it just has to be a laptop. There were still french farmers using text only BBS like terminals a decade ago, quite happily.