Interesting.

I'm in my 30s and I like Black Pink (kinda), but that's probably because my wife is Korean and they're the most tolerable/unique of the K-Pop artists imo (I found them before they got big in my area). I also like Gukkasten (amazing voice), and that's about it for Korean music. I mostly listen to classic rock (not my era or my parents') and recent indie music (largely ska and punk, but lots of other random stuff).

At least in my circle, the people that listen to mostly today's music are young people. People in their 20s and 30s tend to pick and choose from different eras, older people (>50) listen to their era of music, and 40s are more hit and miss and often influenced by their kids. At least that's what I observe.

Spotify and YouTube have made it a lot easier to sample from a lot of different eras, it's not just whatever is on the radio.