The music! (Though I noticed two songs that were out of the timeline. But that happens!) The original soundtrack was pure 80s background music!
I do wonder how those not familiar with 80s culture felt about it.
I am born in 89 so I don't count I am 90s kid haha but I was pleasantly surprised I loved the music and the 80s have such a bad rap. I was googling every episode what song it was, they did a great job at incorporating it into the show.