Our theater writers Jesse Green and Elisabeth Vincentelli discuss two of the biggest hits of the fall theater season, both of them shows about the perils of making art with people you love. The new Broadway production of Stephen Sondheim and George Furth’s “Merrily We Roll Along” revitalizes that famously flawed musical, while off Broadway a play called “Stereophonic” dramatizes the creation of a rock album in the 1970s.
