"Moulin Rouge! The Musical" delays pre-Broadway engagement in Boston; "The Lifespan of a Fact" will be first Broadway show with an all female design team; Off-Broadway's "Sweeney Todd" becomes the longest running production of the show ever; new musical about Juneteenth in development; reader reactions to the New York Times’ list of the 25 best American plays of the last 25 years; Diana Rigg posts a "missed connection"; good read about Tharon Musser