I've gotten really into it in the past 2/3 years. I think I found it quite inacessible, especially as there's so many sub-genres and niches, but a few of my friends are metalheads and at some point my ear just adjusted and I got it and went back to the early stuff in the late 60s/70's where it was closer to my usual stuff and just did a deep dive. Had a similar thing with rap in my early 20s where growing up firmly a post-punk and alt rock kid I was quite staunchly not a fan, and then it just clicked and I was down a rabbit hole for months.
It's what I love about music so much, there's more incredible music out there than I can ever listen to, and when I get into a new genre it's like I'm a teenager discovering my passion for music all over again.
I don't think anything else does that. With books, film, great TV, it's always great when you find something new, but nothing really opens up new worlds and subcultures like music.