The next level is that the Stranger Things characters are having a reunion D&D session and they've updated the old adventures themselves.They were using a mixture of Basic and AD&D products on the show (and no doubt a load of house rules). Which is what we did at the time.
But they could assume these are updated versions of the of 1980s adventures, but keeping most of the original text.

Though I can't remember if this implies a bittersweet moment already or will in the future.