You see a lot of AirPods (I was gifted a set myself) but you see even more wireless over-ear headphones. I probably notice those the most. And wired are still common, though not necessarily 3.5mm.
I dunno... I was watching an NBA game* the other day and 4/5 players had AirPods in as they entered the arena and the other singleton had over the ear headphones. This totally caught me off-guard, and was so noticeable I made a mental note of it.
* I know, not representative of the general population, and USA-centric, but the A list tends to be representative of what people want and, if they can afford it, what they have.
Have you watched The Defiant Ones[1] on HBO? I can't exactly recall if they were giving Beats out to players for free, but there is a segment of the documentary where they talk about how ubiquitous Beats became because players were shown wearing them in the pregame. You could be pretty spot on with your assumption.
You see a lot of AirPods (I was gifted a set myself) but you see even more wireless over-ear headphones. I probably notice those the most. And wired are still common, though not necessarily 3.5mm.