Ultimately, “Live By Night” doesn’t suggest Affleck’s lost his groove so much as that his groove has its limits. Saddled with derivative material, he can’t seem to find a fresh approach. It’s telling that the next project that finds him on both sides of the camera is “The Batman,” a studio-produced blockbuster hardly expected to take big risks. Affleck may not be a total sellout, but he’s the kind of steady-handed entertainer equally capable of making smart movies and forgettable ones depending on the task at hand. It remains to be seen if “Live By Night” is the anomaly or a regrettable new chapter in an otherwise satisfying career of intelligent escapism.