If you purposefully seek out exposure to new things, you'll find stuff you like, regardless of age. I have a friend that brings me along to all sorts of concerts that are well out of the wheelhouse of what I listened to as a kid, or even 5-10 years ago. I frequently get home and purchase their full discography the next day. There are subgenres of the broader genres I like that are quite different from what I am used to, and I keep an eye out for new ones - I've long been into various types of metal, but it was the Judas Priests, Iron Maidens, Megadeths, Slayers that dominated my teenage years. In my 20s it was power metal and then death metal and black metal. In my early 30s, it was prog metal. Now I'm listening to a ton of math-y stuff and djent. I have had many detours into jazz and blues, electronic music, and every now and then very mainstream pop artists make their way into my collection.
I don't think I'm wired in some special way that lets me keep liking new things, it's just that I seek them out when I know a lot of people my age just don't.