Exactly
There are some books written in languages that are lost in the process of civilisation. Materials like this tends to remain in hard copy because it takes a life time of studying them before it is completely transcribed.
The scientists are still working on so many old and ancient tablets and scripts to translate. While according to current tech, who knows how long these e-books will last. They are just one virus away from oblivion.
That is one way to look at it, I guess there is a limit to looking backwards before we start focusing on what is ahead. All the ancient text can never be fully digitalised, we have to stop at some point and start focusing on the new history we are making.