Kyle Anderson: The road to Kendrick Lamar’s To Pimp A Butterfly was not as rocky as the one that led us to Madonna’s Rebel Heart, but it was still fraught: After “i” arrived late last summer, the follow-up to Lamar’s astoundingly great debut good kid, m.a.a.d. City seemed imminent. But Kendrick played everything pretty close to the vest, and he would not commit to a release date until a few weeks ago—when he announced that To Pimp A Butterfly would arrive on March 23.