If the words in Maximum Entertainment are religiously followed, magic should logically be composed of Extraordinary moments.
I disagree with this premise. If I understand you correctly, you're saying that in Ken Weber's (author of MU) opinion everything termed "magic" should consist solely of Extraordinary Moments, with no Tricks or Puzzles.
That's not what Ken Weber says. On page 41-42 (of the revised edition) he writes:
"Overwhelmingly, professional magicians perform tricks.
That's not a pejorative statement. Tricks have the ability to thoroughly and satisfyingly entertain. The pantheon of magic's elite thrill their audiences with wonderful tricks.
[...]
Superb Tricks, with the occasional Extraordinary Moments -- those should be your goals."
As you see, Mr Weber doesn't claim that magic should be composed only of these Moments.
But to get back to your original question: Why don't classic books like RRTCM and ECT teach any Extraordinary Moments, but only Puzzles and Tricks?
I believe there are two main reasons: 1. It's oriented towards beginners and is (correct me if I'm wrong) solely based on sleight-of-hand and maybe a set-up deck. There's only so much you can do with no gimmicks and only basic sleight-of-hand skills, so it seems logical that it's difficult to create anything else than Puzzles and Tricks.
2. It's difficult to achieve Extraordinary Moments with card tricks. Other people can explain the "Why?" behind this better than I can, but this has been my (limited) experience, which fits with what I've heard from others.
If so, then does that mean those long routines or effects should become 'obsolete' in terms of magic now?
Certainly not all of them. Again two reasons: 1. There are still some very neat tricks in the books, that are baffling to the onlooking layman, and 2. because from time to time, somebody comes along and puts a new spin to the trick. Vanishing Inc.'s Principia is an example of this. In one of the effects taught, Harapan Ong puts his own little touch and final ending to Poker Players' Picnic (the first effect in RRTCM, I believe).
If not, then can those effects also be promoted to Extraordinary Moments? How?
Again, people like
@RealityOne and
@WitchDocIsIn can answer this better than I can. But if you read through Maximum Entertainment, you'll find traits of Extraordinary Moments: they're very direct. They're quite visual. They're easy to follow and not needlessly complicated. Looking through the book you'll find a lot more than that, but that's just what came to mind.
Another question you could ask would be: How do we keep Extraordinary Moments (EM) from becoming Tricks, and Tricks from becoming Puzzles?
Mr Weber provides (part of) the answer in his book: Don't belittle the magic. He tells the example of Michael Ammar performing a floating candy trick (an effect with the potential, as he says, to be an EM), but after that he pops this floating candy into his mouth laughing and saying, "Isn't that neat?".
Don't treat your magic as less than it is, or your spectators will follow suit.
Another aspect of this is the performer's attitude: Does he present the effect as puzzle, or as magic? An example of this can be found in today's Vanishing Inc. newletter: "Challenge: Can you figure this out?", is the large headline, followed by the description of a seemingly impossible magic effect.
"Can you figure this out?" Seriously? Of course one might argue that, as it's a newletter from magicians to magicians, and everybody knows that everything done is possible somehow, this isn't too bad. But isn't this headline an example of too many performer's attitude these days?
Anyway, this topic has been endlessly discussed many times already, and my aim isn't to further dig into this can of worms I so thoughtlessly opened. My goal was simply to provide part of the answer to the question we should all ask yourself: How do we keep Extraordinary Moments from becoming weaker?