"We the old or almost old (am 62) must be careful not to engage in reverse agism.
Emotional maturity is a vague notion. In any case it is far from clear that (however one defines it) it would just keep improving indefinitely with age. The strawberry achieves ripeness, and at that point it begins to decay. Physical decay does not spare the mind after a certain point. A benumbing process does begin in old age that is responsible among other things for a soothing relief in the peaks of despair and depression experienced by some in the previous, “mature” decades.
In some cases, poetry being the clearest, the capacity to produce remarkable work reaches a peak at a pretty young age, and then it usually dries out quickly, as the belly expands. Exceptions exist but, in my experience, they are infrequent. There is a flame, a vigor, a freshness in the poetry of youth that does not carry on very long into maturity. The wise ones, when they see the problem coming, switch to prose, and some become extremely good at it, like Vladimir Nabokov.
It is true that musicality takes long to develop. It is notoriously absent in young children and even in many adolescents who can be otherwise prodigiously advanced in technique. But it is probably not true that musicality just keeps improving indefinitely. In some cases it may be very exquisitely developed by the age of 30.
Yamaha GC42S" Fransisco
I don't understand terms like Agism. It smacks of political correctness and is not a valid concept in my opinion. And, to compare a strawberry to a person is also a difficult stretch for me since you are comparing an insensate object(a piece of fruit) to a complicated sensorium like a human being. It is not a valid metaphor to me but I understand the birth/life/death continuum at which you were aiming. Your above quote about poets is also an untrue generalization since the world would have to discount poets as Shakespeare, Eliot, Yeats, Goethe, Frost, Auden, and Rexroth among countless others who continued to refine and hone their poetic vision of the world until late in life. Those who write at an early age must rely on instinct rather than defined sensibilities based on human experience since, similar to the musician and visual artist, they take years to mature. Certainly, the poetry of Baudelaire seems infantile when compared to the mature Yeats or Frost but he can still be appreciated on a certain level. An exception might have been the Austrian poet Georg Trakl who died young with great talent but certainly had insufficient time to bloom. So, we as human beings cannot be codified like a piece of fruit because intelligent, creative people do not fit into neat orderly concepts of maturation and development. Finally, in regards to musicality, how is it possible for it to cease like a faucet that has been closed with a valve? I cannot accept these precepts since some of my friends are 2,000 years old(Caesar, Aurelius, Plato, Aristotle) and still speak with wisdom from the pages of their works. But, we are in agreement with your last statement and a perfect example is the great South American guitarist Yamandu Costa who, at a young age, has developed a style, technique and presence seen rarely on the guitar stage. I hope you enjoy. Muy sabroso! https://youtu.be/8nZ2V8k8ryQ
playing again, Rognvald
"And those who were seen dancing were thought to be insane by those who could not hear the music." Friedrich Nietzsche, Thus Spake Zarathustra