Why no new Al Green songs?

Scott Adams wonders why great musicians can’t keep cranking out the hits every years?

“Consider Neal Diamond, for example. He wrote and recorded some of the greatest songs ever. But then the hits stopped coming, despite the fact that his talent probably improved with experience.”

I wondered the same thing a year ago, but Mr. Adams offers a reasonable explanation:

They can do more of the same sound, and consumers will think it sounds too much like the last album. Or they can try something different, and be unfavorably compared to their own hits. The public won’t be patient while the musician develops the new sound. It’s an almost impossible challenge.”