Part of it is social signaling ("I'm cool because I don't follow the mainstream"), part of it is the analog-is-better fallacy (though I don't know enough about

Part of it is social signaling ("I'm cool because I don't follow the mainstream"), part of it is the analog-is-better fallacy (though I don't know enough about photography to know if it applies to film), part of it is nostalgia, and part of it is simply people being curious and quirky.