In a case of double-reverse-getoffmylawn-irony, the author is apparently too old to understand that Instagram icon is capitalizing on the very real nostalgia by hipster twenty-somethings for Polaroid cameras.
This kind of retro-enthusiasm is very selective though. Recently I had a friend chastise another friend on why he would have an interest in vintage computers. Later that day, when visiting said friend's abode, I discovered an Atari 2600 configured with a SynthCart that allowed him to manipulate it as a retro-new-wave electronic instrument.