I have never understood why psytrance subgenres are so focused on BPM range. There is so much more to music than the tempo, it has always felt overly reductive to me. I had a friend who was a psytrance producer and even hearing him talk at length about it, I was never convinced that BPM was a critical differentiator. Also respectfully I think categorizing a subgenre as falling within 4 BPM is outrageously too narrow.…
Casual listeners can't detect it, but it strongly affects the possibility space for production purposes. For instance, if you're writing happy hardcore music at 170+ BPM with a kick drum on every beat, you will get surprisingly little time between those kicks to work with the bass and other instruments. While this is a somewhat extreme example, even something like the difference between 128 BPM and 138 BPM can change…
There's one moment in a Forest Drive West set (I wish I could remember which one) where he plays the first 45-ish minutes at 160-ish, and then drops down to 125-130 for the last 1hr+ - but he does it in a manner that you never hear DJs do and almost doesn't work. He leaves the ~160BPM track playing, and brings in the 125-ish track over it in a way that creates this really cool syncopated rhythm. It's risky, and there's a reason you usually don't see people do it, but he pulls it off. I have a particular fondness for Jazz music, particularly Jazz musicians who fuck with time in a similar manner, so to hear a DJ pulling off something like that is awesome to me.
But yeah, highly recommend checking out Dozzy's surprise closing set at Terraforma[1] and Patrick Russell's Mostra[2] set.
Edit: The FDW set I'm thinking of is his set from Boom Festival[3].
[1]https://soundcloud.com/donato-dozzy/donato-dozzy-terraforma-...
[2]https://soundcloud.com/monument-podcast/mnmt-recordings-patr...
[3]https://soundcloud.com/boomfestival/forestdrivewest-the-gard...