Is middle age too late for an earth-moving romance between a Bostonian with Brahmin reserve and a Midwesterner for whom grand passion is essential? In Later Life, the 1993 hit comedy revived by the Keen Company, playwright A.R. Gurney dramatizes this question with characteristic wit and capacious heart. Gurney, who grew up affluent in Buffalo, N.Y., carved a niche for himself Off-Broadway with a handful of urbane comedies—notably The Dining Room and The Cocktail Hour—whose characters have origins similar to his own. When Gurney died last June at age 86, he left a legacy of 49 plays, plus operas, musicals, and novels.