Those movies (as great as they are) simply take place in the 90s. The fact that they take place in the 90s isn’t exactly a selling point. (The 90s haven’t gotten that yet, while there are dozens of properties that accentuate the 80s). Stranger Things is just as much about the 80s as it is the story, which is why it’s such a great tentpole for an “80s year.”
And the aesthetics that you name (but don’t really describe) proves my point. Outside of “grunge” and “baggy clothing” (which aren’t distinctive enough for a marketing campaign), everything you list is better served by a 80s year (2-D Video Games, Corporatism, Drug Use) or a 2000s year (3-D video games, technology).
The phrase “Neon Laser Wording” is definitive, screams 80s, and is marketable. The phrase “Y2K” screams 2000s (even though the panic was the 90s), and is something you can center a house around.
The 90s was the best decade because it had both but was focused on neither.