I knew a scientist. He didn't retire, but he got fed up and left in disgust and changed industries.
I spent 25 years of my career in electric power. When utility marketing programs became nothing but efforts to convince customers to use less of their product, when they stopped building new conventional plants, when they capitulated to the extreme radical environmentalists instead of fighting them, and when people like John Bryson were made Chairman, CEO and President of Edison International, I knew it was time for me to leave the industry. I, too, left in disgust.