That whole movement was kinda self contained. Early 2000s Central Europe.
There's a party drug contribution that's really instrumental to these movements. I have been thinking of how to do a musical taxonomy by narcotic, but it's hard to do without making everyone sound like a junkie.
New Beat and MDMA, Disco and cocaine, freeform Jazz and heroine, etc. (I'm a big fan of all of these btw, and could likely make you want to "delete my number" talking about them. But pretending like Gino Soccio (https://www.youtube.com/watch?v=yhAPoip5YeQ) or Tantra (https://www.youtube.com/watch?v=IyqkePY6FKY) or the partiers listening were sober is personally, not very plausible. Sure, I'm sober, but I'm an outlier)
The big theory here is the genres that seem to compactly come and go in a few years, seem to have a high degree of self similarity in releases (take reggae or psytrance for example), and seem to be popular with the party kids might be heavily linked to a particular single or set of narcotics.
Take happy hardcore for example. Thousands of tracks, labels, artists, a huge culture and scene behind it, of well, to be honest, a bunch of teenagers on drugs. Take psychedelic rock and LSD.
Again, this is a really touchy subject but I kinda think drumcore is in that camp. It follows the same chronological and social patterns and seems to fall in the same circles.
I'm not a drug user but I've been to enough parties to know there's certainly a different prevalence in different circles. It's even more difficult because you know, it's all technically illegal so people aren't entirely forthcoming and people don't tend to leave great documentation of illegal substance use around for future historian study.
Maybe a cross comparison with police arrest reports would be as authoritative as we can get? Even that is tough though because in all the hundreds of underground raves I went to in my teens and twenties in california, police arresting people happened at I believe zero. So that sample size is extremely small.
And even then, everything usually gets consumed rather immediately and if they bust a dealer what they're finding are the unsold inventory so even that's not a good metric, the "empty shelves" are the important ones.