:--)
The more 'fancy' quotes I looked at the more I became convinced that your later use of the word was pointed and not by accident, and ultimately I concluded it was all high humor. Fancy that!
Several people use 'natural'. Those possessed (or is it dispossessed) by use of the term are perhaps more irked by having been led down a path towards something which is not that. And we see no advocacy for 'not that' has risen, just irkedness, although a small handful (no names) in the face of au natural simply don't give a .... I kinda admire them for at least standing up for not that despite myself being an advocate for the sound of live music as my own reference.
HP's vocabulary and its relative acceptance is/was, imo, a function of his primary tenet that we should use our ears rather than measurements for gauging stereos and components. (David somewhat disagrees with me on this.) HP's vocabulary developed from his attempt to phenomenologically describe what he heard and it became more of an on-going dialog with readers rather than being codified as some see it today. I think his acolytes and some who mis-used or over-used his notions did far more damage.
Alas, tenure isn't what is used to be - but thank you!