My genre of choice is rather different from Medeski Martin and Wood, and my peak dB is perhaps 10dB less to preserve what is left of my hearing, but yes, the EMOTION is significantly conveyed by the characteristics that a good high end system reveals, that the car radio does not. I am puzzled by the "very little note overhang", the way that notes are sustained, the delicious way in which (e.g.) the harmonics of a piano note decay differently is a source of delight. And, indeed, a frustration with audiences that insist on applauding halfway though the last chord of a performance.
While I do not listen to very old recordings, my library goes back only to the late '50s, listening to different performances of the same work, hearing what different performers find in a composition is fascinating, and enhanced by a revealing system. I will sometimes listen to the same piece played by different artists back-to-back. Recent examples, Glenn Gould & Angela Hewitt playing the Goldberg Variations - both recorded the work twice. Truly startling is different renderings of the C Major prelude from book 1, the notes are the same but ....
I used this as a counterexample for a jazz enthusiast friend who was maintaining that classical musicians "just played the notes" while jazz musicians created music through their extemporization. I am in no way denigrating jazz or its performers, I listened to jazz and went to jazz concerts in earlier times, and what the musicians do is remarkable.

