I don't quite understand the question, so I'm probably misreading entirely, but it seems to me that 1) there's no such thing as a limitation on the "relevance" of music (or any other art) except for phony imposed limitations (usually by folks who feel that their young 'uns ought not to be messin' with other peoples' cultural artefacts) and 2) if people look outside their "own traditions" is can't help but be a good thing. But then again, I'm sure I don't really understand the question.