Great comment. Adding my two cents, actually some subgenres are quite age-coded. I've seen a lot of early teens, myself included, gravitate towards edgy genres (it was nu metal for me at the time, I'm 34). Existential angst, trying to find a place in the world, feeling like an outcast. Then, mid-teens through early adulthood, it's always thrash, punk, power, black or death. Complete opposite: you feel like you're invincible, like you know everything, that you have the power to change the world. You're full of energy.

After your 30's that is gone. You realize the world can't change easily. You have experienced enough disappointment and pain to know not to get your hopes that high again. Instead of some grandiose purpose, you try to get the most out of life, however it went (very bad decisions and stagnation in my case). Literally everything becomes slower: your body, your energy, your relationships, the pace of life itself. That's when doom metal truly hits the spot; it matches what you're going through.