How did Nice Guys (2016) make me nostalgic for a time when I wasn’t even alive?

Just finished watching it and I loved it. I'm really puzzled how it didn't do so good at the box office and because of that didn't get a sequel.

But what really interests me the most is how in the heck did they manage to invoke the feeling of nostalgia for me? I'm not from LA and I was born in 99 (the movie is set in late 70s Los Angeles).

Yet throughout the entire movie I felt nostalgic?