Indeed, even if it had only lived up to the memory of all its many references it would be something special — Chazelle nods to the likes of “Top Hat,” “Singin’ in the Rain,” “The Umbrellas of Cherbourg” and “An American in Paris,” and more, after all.
But any film investor offered a La La Land starring, say, Tony Award winners Sutton Foster and Billy Porter might simply have quoted Fred Astaire in Shall We Dance: "Let's Call the Whole Thing Off!"