Why are so many of us stuck in the past?

Like I get how nostalgia works and I get that 2008 and 2020 shook a lot of us but it seems like so many of us saw the office and listened to linkin park and decided that’s it for them and I don’t get how that’s still satisfying?

I’m 36. I never stopped exploring new media. I kept changing as a person. I know modern memes, idk. I’m not trying to be malicious, I’m coming at this from a genuine place of curiosity. Why are old tv shows and music enough for so many of us? Why did we settle and stop exploring? It makes me sad thinking about how small that life must be, but maybe it’s just cuz it’s not for me? Help me understand