Although I don't see any classics in this fellow's discography. Somehow his repertoire is not believable, or at least so huge as to be not impressive. If someone has learnt the entire classical repertoire, and has a list from A-Z of composers of modern music whose music they also play, I doubt they have spent much time making a deep and lasting investigation of the music they play. Why should I judge though? I've never heard em.
But I did go to hear the well-known pianist Robert Taub play recently for Babbitt's 90th birthday. In addition to works by Babbitt he included Chromatic Fantasy and Fugue, Waldstein, and Scriabin 9th. I had never heard of him before, and reading his bio beforehand I was suitably impressed, with James Levine this, world premier that, Munich, London, Paris, New York, whatever. I was then suitably shocked to hear him hack his way through the Bach with memory lapse after memory lapse; make a total mess of the Scriabin, play a beautiful Babbitt (did he play the right notes? does it matter?), and churn out a performance of the Waldstein worthy of a second-year student at the Royal College. What a disappointment! Why does it happen so often, that those claiming such a devotion to modern music, make such a hacking mess of the classics? Scriabin is not necessarily a "classic" in the sense of Bach or Beethoven, but this charlatan couldn't even play his way through that particular wet paper bag. I'm guessing the same may hold true for this guy, except he probably has better technique. I don't think I would drop 30 bucks to go hear him play Carnaval, or even Prokofiev 7th sonata for that matter. It's a little bit overkill!
Walter Ramsey