I would assume that he just earned so much money that he’s rich and can now do something else with his life without caring about money. Good for him.
Early? If you've been in tech (or any job, really) for 35 to 40 years you're going to be in your 60s (or close) which is a normal time to retire.
Now people who have run faster and faster on the hedonic treadmill with their inflated tech salaries, they are going to be in trouble.
This is especially true if you consider salaries world wide vs just the United States.