Andrew Druckenbrod likes the Pittsburgh Symphony’s new season. But he’s dismayed there’s so little contemporary music. “This has became a soap-box issue for me out of concern for the field, not for selfish reasons. I love the classics as much as anyone, but if the industry stagnates, it will fall off the map. Not die, just become less and less important, and ironically, fewer canonical works will be heard. Presenting the canon is good for marketing and subscriptions in the short term, but years of that shortsightedness creates lack of relevance that eventually does show up in the box office, as it has for orchestras and the PSO even before Sept. 11.”