RLLillis said:
No takers? Okay, I’ll start. One of the main roadblocks to adoption at major universities is that the bookstore makes a great deal of money from selling those books that instructors make students buy for HUNDREDS of dollars then only casually refer to or use only a small portion. Universities will see this as a money loser and may not look at the wider ramifications and benefits to mixing and ordering custom textbooks.
Textbooks are dinosaurs of a past age. They are out of date when they are printed. Instructors usually don't assign the whole book because there are only a few chapters that are really innovative and worth reading. Because of all of the players involved, book publishers, editors, designers, etc, these books can be quite expensive.