All musicians, household names or not, have the prerogative of playing only for their own pleasure. They take no pledge to penetrate to the very identity of the composer as Andras Schiff does for Decca in the complete Schubert sonatas, or as Karl Engel does in his 6CDs of Mozart's complete solo keyboard works or, again, as the Bronfman ensemble does for both Mozart & Schubert chamber music. All musicians have a choice as to which group to join.
Here Perahia and Lupu jump into the first swimming pool. They are having a wonderful time enjoying their splash and they've no doubt we'll love it as much as they do. And they're right --- the Amazon reviews are not only positive, but rapturous. I demur. I wish the duo had summoned the ESSENCE OF THE COMPOSERS to the concert instead of pleasing themselves first and foremost. That their playing is world class, sensitive, tasteful, accomplished, of a single voice all goes without saying. But for potential buyers who want COMPOSERS to be present and EVEN DOMINANT in the music making, my advice is to hesitate before jumping into this swimming pool built for two.