I find it interesting the few singer/songwriters I've followed. They do something that makes them really popular, they sell a bunch and tour, then...They "explore a new sound," go all folky, loose it, then disappear. Especially the female artists.
Reminds me of a comment my Mom's cousin that was a successful painter/sculptor..."I don't paint the things I like to paint, I paint the stuff that sells."
I can't afford any of his art.