3 Ways Operas Speak to the Moment, With Success and Failure

New works, “The Post Office” and “Constance: A Confession,” and a revival of Barber’s “Vanessa” show companies attempting to capture these nebulous times.

​New works, “The Post Office” and “Constance: A Confession,” and a revival of Barber’s “Vanessa” show companies attempting to capture these nebulous times.