The Internet is an ever-changing organism. The information changes on a daily, if not hourly, basis. The search engine designers are aware of this and gave the engine the ability to change. No book publisher could operate on the same timetable. Even better is the fact that the search engines allow you, the user ,to make an entry.
Many people like to have a book in hand while learning something on the computer.
It is reassuring to have that tactile object in front of you. This is not the hyperbolic complaint of an exhausted UCSF student in midterms, but the deeply felt expression of torment by the spirit of a drowned fisherman in the the new Noh play, Down the Dark Well. His soul is doomed to hang between the worlds of the living and the dead because his beating heart has been transplanted into the body of a young woman. The woman, while gaining physical life, is similarly tormented -by guilt. In other words, no one has won.