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.
I don't think radio is selling records like they used to. They'd hawk the song and hawk the artist and you'd get so excited you'd stop your car and go into the nearest record store.