I saw a woman on the train with an iPod cover imitating a cassette. This is, I think, poor form. Like the chief of some ancient tribe wearing the head of a defeated tribe’s chief as a hat, it seems unnecessarily boastful of one’s victory. The mp3 player is, of course, smaller, more convenient, with better sound quality than the traditional Walkman. The boxy, (literally) clunky beast was limited to one album at a time, too, and if you wanted variety you needed to carry round a small satchel full of tapes. Or listen to a mixtape.