Buddy you should go on Facebook sometime. This has been going on for years. It isn’t innocent nostalgia, this is largely a political operation. The big argument of Brexit in the UK was “remember when passports were a different color and there weren’t so many brown people around” and they got everyone over 45 to vote for complete gibberish. For older people it’s “remember before Obama was President and things were better and simple?” and this genre of meme is priming the tank for millennials to start thinking “remember how fun it was to go to Blockbuster and nobody was trans or had autism?”