That's pretty interesting. I think the pace of change of the entire culture has slowed, I guess. We have more and more technological advances, so a movie like The Departed like entire plot devices revolving around crazy things called "text messages" feels laughable now. But everything else about that era still seems relevant. I'd say every single article of clothing, every saying, every haircut, every environment in there would work in a movie about today. But that was 15 years ago already. Think about the differences between 1975 and 1990. Or any other 15 year period in there.
Hell, in Boogie Nights you have the same characters looking like
and this
in the same movie, representing like a 5 year change. Pretty weird.