Medical knowledge and technical savvy are biodegradable. The sort of medicine that was practiced in Boston or New York or Atlanta fifty years ago would be as strange to a medical student or intern today as the ceremonial dance of a !Kung San tribe would seem to a rock festival audience in Hackensack.
A lot of music you might listen to is pretty vapid it doesn't always deal with our deeper issues. These are the things I'm interested in now particularly at my age.