Metal riffs to a 4/4 beat pattern the standard for Disco, gets used a bunch in select metal
Sub genres. Maybe even too much. I hear it all over Nu Metal. Just because a few bands, attempt to mesh Disco features in to the Metal sound , does NOT make it " Disco Metal". The Metal side of it domimates over Disco side, so the disco vibe is not standing out. Metal was a rival to Disco, and served as a backlash. And Metal wasn't meant to be fused with any rival sub genres. Especially Disco. I compare it to putting Ketchup on Ice cream. Certain things just dont go together. On the other hand, maybe a proper method is yet to be used to achieve the disco vibe and results would be shockingly suprising. But I doubt that it will ever happen. At least I hope it doesn't.