> I doubt it’d have a material effect on production of new books.

The fact I can just wait to checkout a lot of books I'd otherwise buy digitally massively cuts back on me buying books in the end. I practically don't even subscribe to magazines anymore because it's so easy and free to just check them out on Libby. I just went on a long road trip and had tons of hours of audiobooks digitally delivered for zero cost up front.

Obviously I'm just N = 2 (my wife is the same) but I imagine some decent chunk of potential book sales are similar.