Classical music might be over. But now we’ve got post-classical. And it ain’t a bad time to be a composer. Joseph Horowitz: “Suddenly we’re at a moment when composers are personally prominent in our music life. A) We have important composers who reach a very large audience, and again I’ll just talk for the moment about the most obvious three guys, Reich, Glass, and Adams. B) They’re performers. That’s enormously important. They’re not Ivory Tower figures.”