At this moment in our present era, with the investment from those who bought out radio stations nationally, and financial ties to music acts played on those stations, it is not quite the same as the days when "the people" would move someone up the charts based on the best in the pool, as the pool has been controlled, restricted, and designed toward business over musical progression. I am not sure how much one would want to be in this not fully defined "mainstream" when an album can sell 3-4 million copies, and and the artist can be in debt to label still. Would it be worth it to cut your net worth in half to be called legend? There are already many of those legends