Amsterdam must have more than a million people. But the only area where jazz is really profitable and successful in an economic sense is in Japan. That's because they haven't been exposed enough.
Germany is probably the richest country in Western Europe. Yet they wouldn't take any television with Duke and Ella, their reaction being that people weren't interested in it.
Ella can work nightclubs that Duke might not be able to work, because of having the big band. Where they go now is strictly a matter of their own names and talents.
I don't say that the supposed Civil Rights development is a myth, but it's a matter of dealing with reality. It's purely peripheral and, in many cases, it's just a facade.