By the same turn, it's also much easier to propose and make corrections. If I discover an error in my computer graphics textbook, I'd have to...call the publish

By the same turn, it's also much easier to propose and make corrections. If I discover an error in my computer graphics textbook, I'd have to...call the publisher and see if they can fix it in the next edition, I guess. Perhaps the textbook industry's fixation on keeping students buying the newest editions of their books has actual benefits...