At what age do you start to feel detached from pop-culture?

I started feeling disconnected at 18 years old in 2016. I felt disconnected by ages 20 or 21, so 2018 and 2019.

I think it lets down in waves. Once I graduated from high school and wasn't so exposed (ie: hearing new music, slang, hearing about movies/shows) it did somewhat fall off. Essentially by then I was able to ignore it if I so chose. It also starts to get boring by the late teens or so imo because you can feel a bit like "been there, done that." Even if not with the same trends repeating already, just with the essence of trends themselves coming and going. Like how Christmas gets old eventually and it makes you not feel like a kid anymore. But since then, I wouldn't say I have felt any further removed from it. My interest goes up and down solely based on how appealing I find whatever is getting attention at the moment. By my early 20's I started getting deeper into some older things out of boredom, which I feel like is pretty common, and my taste solidified. Unfortunately though you don't really get the "scene" and the excitement that you do with what's current, so it's a bit lonely to have retro media as your sole focus. You have a lot more opportunities to buy things, go to concerts, etc. than in your teens and if you're already too disinterested in pop culture, then you're missing out. Maybe I'll feel detached another degree by the time I have kids because my attention will be more on finding entertainment for them, but until then (say, mid 30's), there's really "nowhere else to go" so to speak.

Depends on the person, the generation, and the events that are taking place.

For me, my "era" ended in 2020. However in speaking with most people in my age group, they detached around 2013 or so.

I think it has to do more with the quality of pop culture itself. I'm sure 12 year olds somewhere feel detached from current pop culture.