Perhaps a classic “exception that proves the rule” example en.m.wikipedia.org/wiki… . Marvin Gaye is probably in the 4% as well … does Thin Lizzy count?

Part of it was when radio programming began to splinter into “classic rock” and “urban contemporary”. That washed into concert promoters realizing that white arena rock acts pulled a much bigger demographic, with the airplay to match.

And let’s not even get into the whole “Disco Sucks” backlash en.m.wikipedia.org/wiki… .