Consider the pull of the cross-generational collaboration album. When it’s bad, it’s very bad—think Lou Reed and Metallica huffing the fumes of 19th-century German theater on 2011’s Lulu, or Miley Cyrus sloshing around in psych-rock cosplay on 2015’s Flaming Lips-produced Miley Cyrus and Her Dead Petz. But when it works,