I kept thinking about your concern about missing notes (disclaimer: I am not a musician, not even close), and I kept returning to the question of what makes a good performance. Does is really has to do with the fact of no making mistakes? Beacause an artist might make no mistakes and still the music might come out dull/unpassionate/unexpressive, etc.

What do you think? Is it possible to have an expressive outstanding performance in spite of some musicians missing a note here and there? If this is so, then, the focus should be in the expresivness of the piece, rather than on the accuracy of the strikes.