Bernard Haitink is principal conductor of the Chicago Symphony, and apparently the match is a good one. Still. “When I started at the Concertgebouw, the conductor was responsible for the music, and that was it; an artistic manager and a business manager took care of the rest. That has all changed. Nowadays the duties of a music director are far too much for one person. And the people who are available to fill those positions never want to give that much time to their orchestras. And the ‘sell-by’ date of a conductor is maybe a little bit shorter now.”