Cultural value is as important as technical advancement, at least in the long run. I think you could agree with me.
A notable cliche is still VHS. In the 80s, it was a far-from-optimal video system, but recently it has became a symbol of the 80s. Another example is the proliferation of home computers in the 80s, while many were groundbreaking, we also had some that were closer to a market bubble than a technical accomplishment, and were known as "Trash 80s" but now it's still something different.
And thanks for your additional commentary on soundchips.