I used to love hearing the  BBC Welsh play their 'party piece',Elgar's First  Symphony,with Tadaaki Otaaka, as it was always a special occasion.

Is there a moral taboo about playng 'left hand' works with both hands (if you can) ? I should have thought that made for a better performance;or are you supposed to make it more difficult for yourself?

And why do pianists  nearly always lose the use of their right hand?Are there any works for piano right hand?  Can anyone recall which hand Cyril Smith lost the use of?

In Wittengenstein's case, it wasn't just the loss of use of the hand, it was the hand itself, of course, due to war injury. In Leon Fleisher's case it seems to have been some sort of RSI, happily recently cured by surgery. Might it be that RSI cases are more likely to be in the right hand for keyboard players, simply because in general more work is expected there? Cyril Smith lost the use of his left arm due to a stroke, by the way, which meant that he didn't have access to the works written for Wittgenstein: not only by Ravel, but Richard Strauss, Korngold, Prokofiev, Franz Schmidt, Bortkiewicz, Hindemith, Martinu and Britten.

Unless of course he could have got hold of one of these.