Book burning in the digital age

I like many people, don't purchase as much physical media due to digital counterparts.

I can stream tv/movies/music/podcasts, listen to audible, read on a device, while never having to purchase the physical item.

Schools have transitioned to digital learning, we may reach a time that text books aren't printed in physical form.

In age when censorship seems to be on the rise, if digital media is all we have in the future, what's protecting us from something being deleted or edited and having any recourse?

If someone can go back and alter their text for books/articles/etc without noting that it was changed/what the change is, and delete the original, will we all need some new form of screen shots/saving all documents we see in order to show them as proof of change?