The Fall and Rise of Bundle-Based Businesses

The Fall and Rise of Bundle-Based Businesses, article.
"In aiming to break apart the traditional computer book into its component chapters (albeit with more depth than a book chapter would have space for), we were channeling the bundle-busting trend."

It's similar to something I have touched on briefly before, the length/size of content, what works in digital media contra what works/worked in atom media. I'll bet for instance that even if it should turn out that novella-sized works (10,000-40,000 words) are what works best in ebooks, experienced novelists (a novel is over 50,000 words, often several times that) will have a very hard time breaking the habit of writing to a different length than what they're used to. Training is very sticky.