That is fascinating. Does it imply that part of the high frequency is detected by the stylus under tracking weight microsopically compressing (presumably elastically) the vinyl different ammounts at different densities?
For some pressings in some playback systems. It's dependent on material (vinyl, bakelite, etc, when you go back to old materials), but for modern vinyl, generally. It's the pressure (which is not small when you compress that 1 gram into such a tiny contact area) that often (not always) reads the highest frequencies. (The issue depends on pressing speed, etc. LP is close to a black art in some ways.)
The laser turntable discovered this as well as the dust issue, and apparently there is some way to partially recover the varying properties of the vinyl. I do not know the details, it's proprietary, and probably the result of a lot of hard work. The laser, of course, does not put any appreciable pressure on the vinyl. That's the good part, it is for the most part nondestructive "readout". I do wonder if at some point very complex image processing may enable avoiding dust, etc, as well. (Some is done via spectrum probability, but that's far from perfect.) I wonder, also, if there is any commercial benefit to this, sadly. It wouldn't even nowadays be an easy task, and would use a LOT of floating point. (And when a signal processing guy says "a lot", that's a lot!)