Alejate,

You sound like a candidate to become an Absolute Sound reader, as I am. Their premise is that music reproduction systems should try to emulate the sound of acoustic instruments playing in a real space. I think the problem with recording any piano is that the sound emanates from the entire instrument. Where do you put the mics? Too close to the hammers and the sound is detailed but unrealistic. Too far and the sound is washed out. I think that getting a coherent sound from acoustic instruments is very difficult compared to direct boxing an electric guitar. Too, what is the absolute sound of that guitar? Answer: there is none. We all know what a clarinet should sound like but, that guitar can have dozens of different timbres with the twist of a dial.
As a musician, I am happy to listen "through" the recording medium and I can hear the music even on scratchy old 78s. Likewise, even a bad sound system doesn't really bother me. I can appreciate the sound of my high end ht but, I can happily listen to my Chopin on the car radio, too!

Jay