The popularity of left-for-dead formats in some circles makes us wish we had saved that Sha Na Na flexi-disc that came with a box of Tide mom bought in 1977. Vinyl died and then was instantly reborn and had a cult following. A growing network of underground artists and tape buffs have resuscitated the cassette as a hip period-piece/music provider. And now the clunky 8-track tape is getting a second look.
