As an aside...
I have always thought jazz was an improvisors art form. That's why I love it.
I have always thought of classical music as a composers art form, and "pop" music as a commercial art form. There is plenty of pop music I love. Being a bassist, it is hard to resist the power of the simple groove in some commercial music.
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I'm also a sucker for a good bass groove - wherever you may find it!
But I thought this was a interesting point - so I was into rock/pop for many years, but as I got older I started to find it predictable and boring - the same few chord sequences and what is the point of going to a concert where the musicians are just trying to reproduce the sound of a classic album they recorded years ago? After a while, I felt it was better to listen to the CD and hear it how it was meant to sound if they weren't all drunk, too old, doing it for the zillionth time etc.
Whereas if I go to a Jazz gig - they are not trying to re-create something from the past - but are "in the moment" and responding to what's around them - not what they played years ago.
A Jazz pro and teacher I know named Julian - told the story about how he goes round to schools and talks about Jazz. Often the kids will say - "oh sir, can't we do something more modern" and proceed to play a rock guitar riff of indeterminate provenance.
Julian said to them - that music is old, around for over 40 years now and hasn't really changed. Here's a Jazz piece I wrote last week and will be playing with my quintet at a venue tonight, which will be completely new to the world and never played the same twice - that's modern!!

