But to a certain extent , how we listen also determines what we listen to. I’m going to use myself as an example although I don’t know how representative I am. In 1999 and earlier, although I could have carried cassette tapes in my car, I didn’t really do that except on a long trip. For day to day driving, I listened to the radio. And everyone in the car was listening to the same thing - so if I tuned into the the top-40 station that my kids listened to , I was hearing current hits. And even if I was listening to a “classic rock” station, they also played newer releases by the format’s core performers.
But now- between Sirius and the ability to play music from my phone over the car’s speakers, I rarely hear any current music so I don’t really know how much music has changed since 1999. I probably wouldn’t recognize a single song on the list of the top 100 songs of 2021 except “All I Want For Christmas Is You”* unless there happened to be a remake of an older song. Which OK, I’m an old person, so that’s not so surprising. But just like I heard new music when I tuned to the top forty station for my kids, when I was a kid the top-40 stations played a variety of different types of music - so that although I was never one of those “at a disco in the late 1970s.”* I was familiar with the disco music that made it to the top 40 and disco fans would have been familiar with a Queen song that made the top-40. But I suspect that doesn’t happen nearly as much in a world where everyone can pretty much always listen to their own personal selection of music
* Which I am sure makes the list every year.
** And therefore, late '70s me would have looked out of place in a disco. There are some styles are very associated with a particular time period - but others not so much. I can’t find it now, but in a previous similar thread I linked a photo of Jerry Garcia in the '70s wearing Levis, a black T shirt and boots. That outfit wouldn’t have looked out-of-place at any point in my lifetime although it also wasn’t the height of fashion at any point in my lifetime.