Why is it so fashionable to dump on Sundance (yes, it’s that time of year again)? “Sundance has triumphed because it changes its public face at a moment’s notice—from pointy-headed and grave when indie film needs rejuvenation, to glamorous and cheerleading when indie film needs marketing brio. To wail about Sundance renouncing its founding mission is to assume the festival had a profound mission to begin with.”