Something I hadn't thought of before as some people have argued audiobooks can be on par with ebooks, this seems like a clear winning trait in favor of ebooks Example, Plato's classic "The Republic": 464MB MP3s of The Republic on audiobook: https://archive.org/details/plato-the-republic 1.2MB PDF ebook on https://archive.org/details/TheRepublic_201612 That's 386x more data that needs to be transferred / stored for the audiobook over the ebook If we round up the audiobook to 500MB and PDF down to 1MB, that's 2000 audiobooks per terabyte of data transfer or storage versus one million ebooks; of course the numbers vary but I imagine the dramatic difference is still mostly there If [a terabyte is about $55 of storage](https://www.bestbuy.com/site/wd-my-passport-1tb-external-usb-3-0-portable-hard-drive-black/6356886.p?skuId=6356886), then say that's between a nickel and dime per GB, that's the difference between pennies and fractions of a penny per file saved. Anything to add to these calculations? of course for someone who is blind, for example, the audiobook is invaluable, so there is a place for audiobooks, but it seems like for the average person they're the lesser format.