I treasure my printed books as the online editions of reference books like dictionaries have their definitions changed.
I have a new condition Chicago Manual of Style, an compact OED with magnifying glass, a Black’s Law Dictionary 5th Edition, a knock-off Webster’s 2nd Ed. (I cannot afford a real one yet).
Even ABE Books doesn’t carry much in the way of old print dictionaries. They are needed!
Not only dictionaries, but encyclopedia entries keep getting sanitized (e.g., go back and look at old versions of Wikipedia’s Earth Day entries - if they haven’t been purged).
Wouldn’t be surprised if all e-books get the same treatment in time.