Are mature artists welcome in the World of Art?

Is it more convenient for the world of Art and art auction houses if mature artists simply retire from their creative pursuits and fade fade away? Still Prime Time? discusses the topic of artists' later works with Picasso as a prime example of what can happen when creative people dare to age and paint. Does their work even hold up as being purchase-worthy? Is the market for their efforts diluted by their extended availability? Well, read the article for more details, but I say that humankind doesn't create Art as much as use it to express who we really are inside. And I didn't realize there were limitations on it because I thought we were meant to become more of who we are as our lives go on. Actually some artists, famous and otherwise, use their involvement in the creative process - whatever medium they prefer - as a way of transcending life's difficulties such as illness, lack of resources, a dearth of love, a lonely lifestyle...you know - human problems. And if the ...