Probably the same people that like the directional cables.
I just think it is hypocritical for people to make a fuss over the "sound" of a 3 pound 8 ounce T body versus the "sound" of a 4 pound 2 ounce body, and then they turn right around and profess indifference to the addition of 4 ounces of dead weight, way out on the far end of the neck, at the headstock.
Maybe I've assembled too many model airplanes and kayak paddles, but to me, what's going on at the far margin of whatever you're fooling with has disproportionate impact on the performance of the project. Doesn't anyone's intuition tell them this, even if they haven't done the math?
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It does seem to me that a lot of people prefer a black and white world. Either everything has a measurable impact on guitar performance or nothing does. But the truth is, there are things (like solid body electric guitar body finish) that were 99.9% hype. And there are things like trying to choose the wood type for an electric guitar project where it is fraught with tedious trial and error - maddening searching in near darkness for the right result. But, when you start making things out of metal, then predictable results can and do emerge. When people look back on this subject in 7 years, they're going to laugh that nobody would acknowledge that 4 ounces of metal on a headstock could impact a guitar's performance.
I don't own and have no plans to use directional cables. But I've suffered sudden deflation of a directional automobile tire run the wrong way, that was attributed to this misuse. So, I am skeptical about people who close their eyes to every different way of thinking.