I watched the first season when it was not yet the first season but all that the Stranger Things was, it was predictably nostalgic but not too on the nose. When Netflix saw an opportunity for a second season, I did not care. Did not watch it. Screw sequels.
I tried watching the third season, had to turn off about ten minutes in: too much trying for the 1980 feel and way too much plagiarizing. It is a game of finding every quote from existing movies, boring, uninventive.
As Sam Adams from Slate put it, the show turned from a loving homage into a "vampire squid, sucking increasingly hard at a corpse that has long since run dry." I'd rather watch Blade Runner for the umpteenth time. Ah, heck, I may even re-watch Videodrome. Or The Thing. Or The Lawnmower Man.
And if I want to listen to 1980s music I'd rather watch The Americans (I have all six DVDs) or Deutschland 83.