[Updated] I give Paul McCartney credit. He doesn’t have to try this hard. He’s wealthy in ways few of us can imagine, and he has been knighted. He’s 76 and only Bob Dylan among his contemporaries tours as frequently. McCartney could lay out on the island of his choosing for the rest of his life, but instead he’s on yet another world tour, and flew from Brazil to New Orleans to play the first show of his North American tour Thursday night at the Smoothie King Center.