There is actually a lot of terrific shit coming out nowadays with bands pushing boundaries. I feel like that's what a shit ton of bands are actually overtly TRYING to do nowadays and many just fall flat on their face. Only the extreme makes an impression, right? But others hit it out of the park though. It may not be something YOU personally enjoy, but it's still strong, unique shit.
I dunno. It seems to me like you are trying to attain a glimpse of them early "highs" and emotional impact that you received when everything was new and fresh to you. There no lack of great music to sift through these days, imo. If anything, the bar is set extraordinarily high because all the great shit coming out has created a new standard. It's like when I first got into craft beer around 16 years ago. So many different beers and styles were blowing my fucking mind left and right but now, at this point in my life, I've tasted so many godamn beers that it's literally impossible for me blow a nut over a beer. Everything is merely a good beer...nothing more, nothing less. And this is the primetime of craft beer brewing in the world. And you know what? I bitch and moan about it all the time. I complain all the time how the hipsters have ruined it and the "scene" is an abomination and nothing like how it used to be, just as Spikes said, "Back in the day..."
So, yeah. Probably the only way to really re-attain them "peak experiences" is to venture out into uncharted territory and listen to some sounds that you have yet to explore and see what sticks. Perhaps you'll discover some stuff that moves you in ways that metal/rock could never possibly even begin to do. Let curiousity and an open-mind be your guide.