Having learnt magic the classic way I can say I'm happy with that. It has taught me the value of books. It has taught me that a throw away idea can be included in a book. Maybe a few sentences briefly outlining the idea. But with a clear statement that it is just an idea and that the author is giving it out, so somebody more talented is able to turn that idea into a full routine. Basically it is the author admitting, in a very nice way, that he is not as talented as he hoped. Being humble and all.
And then times changed and those throw away ideas become a five minutes endurance marathon with the most pretentious of all characters.