Not sure how many were actually alive when VH hit the scene, his technique is definitely a HUGE part of the sound and success, for anyone who was alive as mentioned, there was no fucking amp that had that type distortion , even in the chords he was playing, not anything I could get anyways and nothing I heard on anything released in that era, Boston perhaps but that was studio vs raw edge IMO. He wouldn't tell anyone shit either. Send you on a goose chase and you still can't get that sound is what I remember. Other than the phase 90 and Flanger he spoke of in 1980 or so in GW. 40 + years later from 78 and we still dissecting his sound, lol it was a mark in guitar history and won't be repeated, copied, absolutely.