The problem is the following, black music is increasing encumbered by white elements, often pleasant but always superfluous, easily and advantageously replaced with black elements.
Boris VianFaith can move mountains but let them happily fall down on the heads of other people. What's the point in moving mountains when it's so simple to climb over them?
Boris VianOne ends up relying on pure musical inspiration, and failing that, the music won't lead to anything good, or it will alienate all but the most die-hard fans.
Boris Vian