The Last MixtapeA reflection on the evolution of physical media into metaphor, through the history of music curation. Obsolescence makes the heart grow fonder, at least in the case of the mixtape. Not all technologies are so lucky. Some (say, wax cylinders) fade almost completely from cultural memory. A lucky few pass into metaphor: we still "hang up" our smartphones, "cut" film, and "patch" computer code. As digital streaming completes the obsolescence of physical