I've never believed in cheapening music by going according to what some people think is public taste.
If you don't physically age gracefully, it's a bit sad. I think Steven Tyler can get away anything, because he still looks like he did in '73. Especially from row Z backwards in an arena. As long as the Stones keep their hair and don't get fat they'll get away with the wrinkles.
When ambitious desires arise in thy heart, recall the days of extremity thou have passed through. Forbearance is the root of all quietness and assurance forever.