I'm going to guess you've never owned a business. In today's Amazon race to zero profit margin, (which is leading to massive shortages in every industry partly because of the "just-in-time shipping philosophies that have helped lead to empty shelves and no savings, (extra inventory)), every penny matters. What you claim is pennies a day over 365 days is a lot. And when you factor in general increase in costs of everything we touch including energy and computer components there are hidden costs you aren't taking into account. Plus the human cost of organizing it, managing it, backing it up, and maintaining the services of storage. Hard drives go bad. If you lose an entire hard drive then you wasted a lot of money getting the titles on there so now we pay for backups because we are insuring the initial investment. If a piece doesn't sell it's time to let it go. It's just band and we aren't talking quality literature.

But hey, maybe some of us are wrong and you could set up a side hustle storing all of that print for pennies and make a little side change for the print publishers. Or you could lose a lot of money getting set up and realize why they didn't do it in the first place.