Stephen Sondheim’s lyric from Follies seems especially suitable for this past year in Boston, and for the classical music world in general. There was a lot of terrible news: the folding of the New York City Opera, the cancellation of Minnesota Orchestra concerts and the ensuing resignation of Osmo Vanskä, the music director who put it on the map (even George Mitchell couldn’t make peace between labor and management). The worst thing to happen to Boston, especially for the arts, was the sudden shutdown of its most important weekly newspaper, The Boston Phoenix (I’m biased, of course, having written for the Phoenix for some 35 years). With only a day’s notice, some wonderful writers were suddenly out on the street, and the go-to place for listings and reviews became the sound of silence.