By “Physicality” I mean the sense of the sound coming from a solid, physical body and this is not the same as “soundstage” or “weight”. As I said, a triangle has “physicality” without having “weight”.
I perceive it differently. A live triangle to me mostly, or at least often, has lots of weight, just like high-pitched percussion in general has lots of weight live. The "thickness", weight and energy of the treble frequencies from these instruments is among the things that sets the live experience apart from a lot of hi-fi.
As long as the illusion that the sound is coming from something you could touch it’s “physical”. And this closely aligns with the demarcation between “live” and “reproduced”. We immediately know without analyzing it that something is live and vice versa. And it has very little to do with many of the traditional desiderata of “hi-fi”. In fact, the pursuit of some of these may even detract from our feeling of “that sounds live!”. Hi-fi, despite what many people say, is invariably a matter of trade-offs.
Agreed.