Usually there are so many good recording of any famous classical piano piece. Consider a piece which has been recorded by all of these great pianists: Horowitz, Richter, Gould, Rubinstein, Gilels, Schiff, Ashkenazy!
Question 1: What's the point of a making a new recording by another pianist? Has anything remained which these giants had not achieved in performing that piece?
Question 2: What can I gain and should look for, listening to a new recording of such a piece (of course other than clarity of the recording due to technology developments)?