Agreed overall... As a young guy, I spent plenty of time chasing his tone with whatever I could get... And when he went with magicstomps, I bought two of them to try to get some of his dual path stuff.
I'm not really chasing his tone right this moment... But there are lots of aspects that I never found and I remain curious.
Perhaps most relevant were his dark tones... To the uninitiated, a lot of those sounds seem to be neck and neck plus bridge with a decent amount of tone rolled off.. and that will duplicate his sound below the 12th fret and on the lower strings..
But those same settings provide a rather anemic sound up high... Missing the sustain in the singing tones he was famous for.
So if you push the drive up and roll off more of the highs you can get his upper register rather easily, but now the low notes are much too heavy and growly...
He used a lot of EQ over the years and I often wondered if dual path eqs were the answer... But when I look at the harness and realize he used it for a lot of his career, I've wondered if it could be a significant contributor to the secret sauce.
Of course I've been at this long enough to know there's 50 different ways to get just about any sound, and in truth, I've got more than enough to work with.
Thanks again for input come I could talk about Holdsworth all year!