This is a very interesting point to me. Jazz history has often been written as a "succession of progressively higher developments" with a Great Man Theory component added. In many published accounts which I read in the 1970s,when I was learning about jazz, the Swing Era giants gave way to the innovations of Bird and Diz, then Ornette and Coltrane took over....then, disappointment--who is the next Great Man, where is the next huge stylistic leap? Oh no! there are none, so "jazz is dead."
I have always thought that such an approach was too simplistic and reflected lazy thinking by the critics who wrote that way. Gioia describes the limitations of that approach very well in the quotation you have presented, Bev. Thanks for sharing it with us.