Right, but that was Nintendo's business decision, and it's really up to society to decide if that's acceptable or not. A hypothetical book publisher could adop

Right, but that was Nintendo's business decision, and it's really up to society to decide if that's acceptable or not. A hypothetical book publisher could adopt a similar models for books - if you're an author, you have to use the publisher's app to write your novel, and anyone who wants to read it has to access it from the publisher's servers via the publisher's app. For whatever reason, said publisher could corner the market on some niche, culturally-important genre of book. Would be a bummer if they decided server maintenance was no longer worthwhile and just deleted all the books as per the license terms.