At the turn of the 20th Century, Rag Time and Classic Jazz originated in New Orleans. What was special about this movement was that it was a create off of the create. One musician started playing a tune, another added his create, then another and another.
One tune could last a few minutes up to a few hours. No two tunes were ever the same. And this was the birth of a new music form that has continued for over a century.
What if there were no do-it-like-this-to-sell-it restrictions?