you can't have nostalgia for something that only happened 10 years ago
I've been noticing a trend of nostalgia for imagined realities. Like, things appealing to nostalgia for realities that didn't happen to us.
Like nostalgia for Boomer or Dickensian Christmases with crooner type music and snowy, wintery landscapes. Or nostalgia for 80's American High School / culture.
Like, we kind of know about these realities, but they happened to others. They're imagined memories of someone else's.