How can a system be judged with highly processed, non acoustic music?

Speaking of Fazioli.  Interesting comparison.

Rolls Royce?  I’m not so sure.

https://youtu.be/mrB8IthgoRQ

Is Metallica considered highly processed by the jury here?

For me yes....

Metallica is like a very good detailed " white and black" drawing...At best....

A lute piece very well recorded is like a color oil paintings...Or a rendition of Chopin or Listz at the piano....

The sonic "cues" are way more subtle and evoke way more subtle mix of emotions...For me....

i like the group "Nightwatch" for example but i listen to only the albums with their first female singer.... The voice add to the group something more poetic and more natural....a unique set of colors.... She was a classical singer educated....


 Amplified or electronically amplified  instruments for me sound more "white /black" pixellation...And natural acoustical sound more like oil paintings...

never enough Frogman ;-) all good.

best to you in the quest, check out 2L recordings download bench, some lovely work on display there….

I tend to not like 'acoustic music', so I can very easily judge a system based on what I DO like. In any case, at best, you are hearing what the producer wants you to hear.