Thanks much, Tom.
I know it's not an ideal approach, but an analogy comes to mind:
In the mid-to-late 1920s Louis Armstrong played music that was almost immediately recognized as both the foundation, and prime/best example, of jazz. Some 25 years later, Charlie Parker, astute and dedicated and talented student of the genre, took everything he'd learned/heard from Armstrong and all the greats that had followed him and 'revolutionized, the music -- so much so that some critics gave it a different name (ie bop).
Those first critics, however, had missed something: yes, Parker played faster, more complex melodic 'lines' using a much richer harmonic palette -- but it was still obviously and recognizably 'jazz', and the foundation that Armstrong laid remained wholly intact, and could still be heard 'as an echo' in the background.
That said, however: what this '2nd generation' great was doing with his music, how he understood it and the function that it served, was much different than that of the '1st generation' great.
To say that the 'art' had become in those intervening years more self conscious and self aware might not be completely accurate, but I think it's not too far off. And the effect/impact of those intervening years *changed* the music, not (in my view) making it 'better' or 'worse' but certainly
different.
I deeply love & appreciate bop, but I can't dance to it!
P