Strange that the author does not mention Japan's greatest visual artist, who by his own (and others') reckoning only became truly great in his old age. Although there are many examples of great artists who do great, and novel, work late in life, I cannot think of another major artist who peaked that late.

From the age of 6 I had a mania for drawing the shapes of things. When I was 50 I had published a universe of designs. But all I have done before the the age of 70 is not worth bothering with. At 75 I'll have learned something of the pattern of nature, of animals, of plants, of trees, birds, fish and insects. When I am 80 you will see real progress. At 90 I shall have cut my way deeply into the mystery of life itself. At 100, I shall be a marvelous artist. At 110, everything I create; a dot, a line, will jump to life as never before.

Unfortunately he only made it to 90.