An opera composer, regardless of their era, always has to address the question, “Why opera?” The answer must come from the opera itself.  Francesco Filidei and Joël Pommerat’s “L’Inondation” tell us their “whys.” Opera, though deemed an anachronic format, brings back this lyrical rhetoric tradition to recover an overpowering form of sensibility. “L’Inondation,” was based on Yevgeny Zamyatin’s novella “Navodneniye (The Flood),” which tells {…}