I love it when a band rerecords one of its old songs (sometimes with a co-artist) after improving and refining their style: Green Day’s “Welcome to Paradise”; Megadeth’s “A Tout Le Monde (Set Me Free)”; The Offspring’s “Dirty Magic”; Mumford & Sons’s “The Boxer” (with Paul Simon & Jerry Douglas); and let’s not forget the entire S&M album by Metallica & the San Francisco Symphony.