Wow! She makes one of the most difficult arias look/sound so effortless. Every note is a pure drop of perfection. In Irish singing there is that phrase, "the pure drop", which expresses this kind of unadorned perfection.
Very few great singers have sung Mozart like Margaret Price. Eleanor Steber was in the same category as a Mozart singer. Phenomenal ladies and singers.
See the credits at the beginning of the video entitled "Margaret Price - Ch'io mi scordi di te?...Non temer amato bene (Mozart) Konzertarie KV 505" and you will see that it is, in fact, Christoph Eschenbach who is the conductor.