William, that end cue from F451 is one of the most beautiful, effective musical moments I have ever heard for film or otherwise. It's as emotive as anything Mahler wrote IMO. Herrmann's genius was how he did break the standard orchestra archetypes and realized that recording offered a composer many more exciting avenues. The difference between Herrmann and Zimmer (and it's a gulf as big as the Atlantic ocean) is that he still employed all of the fundamentals of music- ie motivic development, thematic development, harmony, counterpoint, the whole kitchen sink.
What really gets me hot under the collar is how people want to dismiss these things as old fashioned or outdated. That's like saying "oh, we don't need to train doctors in physiology, biology, anatomy, chemistry, to prepare them for operating- they just need to have good interpersonal skills". Or the bridge builder/architect who doesn't need to study physics, etc. It's hilarious (not really) how often people confuse music with some artsy fartsy "anyone can do this" philosophy and dismiss the fact that its system is as deep as any applied science. These techniques were developed because they sounded good! And they were built upon for several hundred years. But, no, in the space of 2 decades, we have seen a dramatic disintegration of any respect or value in the system of music. Thanks to Garageband or worse GuitarHero, music is just a game that anyone with a heartbeat can do with no practice or dedication towards its perfection.
I also study Goju Ryu karate and it has a very defined system. If I showed up and said I didn't need all those fancy kata and conditioning exercises and felt I was equal to a Shodan or higher (blackbelt) I would get my ass kicked from here to next Tuesday. Why is music any different? Martial arts are also ARTS and they have very defined systems that need to be learned. Funny enough, so many people start with MA but drop out shortly after because they don't have the discipline to stick with it.
I have studied music since I was in university, and I have been composing since I was 11 years old and I still respect those who have more knowledge than I and am humble to keep learning new techniques. All this technology has brought about an arrogance I just cannot fathom. I know I kind of digressed here but these issues I feel are the real root cause of this musical pandemic.