Although I'm not a fan of the word "never," I don't think I'd ever get anything done. At 55, I've aged pretty gracefully, even though there is definitely room for improvement. I eat well, work out, and am told I look quite a bit younger than I am. In the interest of full disclosure, I do highlight my hair.
I'm also a firm believer in being nonjudgmental, so props to anyone brave enough to go under the knife.