Lots has changed. Twitter wasn't much in 2009. Lady Gaga came and went. The economy has improved. Skinny jeans were really just coming in full force in 2009... now they're probably headed out. The undercut has saturated its way into mainstream.
The real answer is: You're getting old, Naso. My parents were born in the late 50s and my mom could never tell the big difference between the late 70s into the 80s. She'd say "I was too busy having kids and raising them in the 80s to follow pop culture."
It's the way life goes. I think what is interesting about you is this perpetual surprise at the normal way of things... as if you're the first person to experience it. I bet you think kids look younger now than they did back in "your day".... .....
I don't think that's it. Even my parents would tell the differences between 1989 vs 1995 or 1992 vs 2000. Now it all seems the same.
I'd say its changed. 10 years ago, superhero movies were nowhere as big as they are today. Iron Man wasn't a household name, a lot of people didn't even know who the Avengers were, Batman Begins had just come out. Since then, we've seen those movies become the main blockbusters for this generation. If you read comics, the industry has seen some massive shifts over last 4 years, with mainstream superhero art styles going away from realism, and the explosion of creator-owned stuff. TV shows have expanded in their cultural influence, and the distribution method has completely changed. Smartphones are widely used, and at least to me are one of the markers of the 2010s. I don't really pay attention to music, so I can't speak about that.
