I think music was played more when I was a kid. The stern was a bit of a focal point. We bought records and listened to entire albums. Today, there really isn't anything like that. A lot of music is on video games. MTV isn't really a thing. And kids can just play the most instantly catchy, or trendy, song whenever they want on YouTube. So if their friends are listening to a song, they can listen to it over and over, immediately and as much as they want.
My point is that the audience today doesn't have the same background... The music from the 50's developed into the 60's and 60's into 70's and then the 80's... 90's etc. each decade adding a bit of its own flavor. But sometime around the 2000's that started to slow. I am guessing the internet was the culprit. Rock bands started to sound like Creed and Nickleback and then there was whatever Korn or SOAD is... and then things just got blurred to the point that it all sounds the same... and for a lot of the younger listeners it is just what is available to their generation.
My daughter likes, what I would consider some of the worst music I've ever heard... and if she hears the current popular song, she goes nuts...everyone does... But she also likes Queen, the Turtles, the Eurythmics... and knows the lyrics, so I know she has listened to them more than once. So its a stretch but I think the millennials and Gen Z don't have the wealth of music to form their tastes... I think a jingle writer would do really well writing pop songs right now. It has to be catchy or the music has to be attached to a social media celebrity or idol type. But insane talent is not a necessity today and music is a lot more about style and a lot less about substance.
So would Taylor Swift be popular in the 70's? Not to pick on her but she is selling tickets at $1000 a pop, so she's a bit of a target. The biggest music star at the moment... She is basically the Beatles. I can't think of another star that has garnered as much recognition.