Martha Argerich used to perform many of Beethoven's works for the piano. She gradually faded into the background; however, she and Seiji Ozawa have reappeared, working together - - a delightful pair of "senior citizens."
Their performance of Beethovens Choral Fantasy is superb! (I've never seen her fingers move so fast)
https://www.youtube.com/watch?v=GjXBKR4iDS8