Yeah, I'd say MOST of Stan Rogers' songs are about getting older--as long as you include the aging and passing away of ships and jobs and ways of living.
Goddammit, I miss that man, and I never even met him.
Ever read Peter S. Beagle's THE FAIR FOLK? The main character is described by a friend as always mourning for things passing away, even if they haven't yet; always aware of what WILL pass.
--Nonie