I think posters are talking (posting?) past one another here. There's the technology of print-on-demand, which can be fine, but then there's the reality of the

I think posters are talking (posting?) past one another here. There's the technology of print-on-demand, which can be fine, but then there's the reality of the quality level of a typical print-on-demand book on Amazon, which is not fine and is largely used to enable scammy overpriced selling of unedited Project Gutenberg texts to unwary shoppers, low-effort piracy, and letting self-publishing authors have a printed-copy option that's not really been formatted well for print (this is aside from any copy-editing issues, which crop up regardless of the format). IOW it's usually, at best, a bad product, and at worst an actual guy-selling-fake-and-stolen-Rolexes-on-the-street-corner hustle.