Seriously now.
I hate the false equivalency of saying that "oh, you don't like X current thing, you're fucking old" but in my case I wasn't into what was popular 20 years ago, or 25 years ago, and I'm still not into it.
What I mean is... with all the niches that exist today you can be perfectly listening to new music and still not know and not be interested in what is popular, etc.
I love bands like Falling in Reverse and Fame on Fire, for example, which are current and popular among the modern rock niche, but I'm not into these current rappers. I also love Maneskin, which has been played to death because of Tik Tok, but they're current and I think they're a great band actually.
I would say 85% of what I listen to consists of new music because I like that feeling of listening to new stuff. Not knowing or caring who this Harlow fella is has nothing to do with being old or not open to new stuff, it's just about not being into a particular style.