I'm imagining a scenario where civilisation has collapsed and all technology has ceased to function. If the purpose of a book is to convey ideas (as the OP correctly states) then ebooks and audiobooks are then useless for that purpose.
I'm imagining a scenario where civilisation has collapsed and all technology has ceased to function. If the purpose of a book is to convey ideas (as the OP correctly states) then ebooks and audiobooks are then useless for that purpose.