We need artists who started older, to compare. Alternative hypothesis- many artists come to prominence with one great contribution, but they can't do it repeate

We need artists who started older, to compare. Alternative hypothesis- many artists come to prominence with one great contribution, but they can't do it repeatedly. Not because they are getting older but because they had one grand idea and failed to deliver another. See, one-hit wonders if all ages. See, The Beatles and Eric Clapton, both famous for continuous reinvention.