“The way that 78s are nothing like LPs has to do with the music recorded on them. 78s are often the only remaining example of a recorded song. Since metal masters were usually not made of 78 recordings, as Petrusich puts it, “if the records themselves break, or are crammed into a flood-prone basement, or tossed into a dumpster, then that particular song is gone, forever.” It took a couple of chapters to really sink in for me. But think about that for a second: There are amazing songs out there that no one living today has ever heard, or will ever hear.”