There is really not that much improvisation in my films. There is an acceptance of a chance.
Speed is a way to escape consciousness and just act.
If you think too much in the music you are too late.
I don't watch a lot of reality TV.
I know there is also the influence of television and being able to zap away so it is a weightier decision to go into the theater than it used to be. And probably attention spans are not as strong as they used to be, generally speaking.
Within the context of Western music, jazz has always contained certain radical or revolutionary aspects. These are: improvisation, collective composition and individuality or the personal sound (based on amazing variations in sonority, timbre and pitch).