In a restaurant long ago and far away, I was having dinner with Jeffrey Bell and Larry Uzzell. Jeff was running against Bill Bradley, and Larry was working for him. Jeff gave an enthusiastic lecture about how John Williams was reviving serious music via the medium of the movie score.
My rule for movie music: the better it gets without becoming actually good, the worse it is.
Kubrick knew how to do movie music: steal from Richard Strauss.