Comment by ergocoder

Retirement isn't quite applicable to billionaires.

They never have to work. They do it because they want to.

Retirement implies there was work you didn't want to do. You did it because you had (or wanted) to make some money. Now you have enough money. You've retired.

Hell, it isn't even applicable to many wealthy software engineers who got rich from tech startups. Many are coding as much as when they were working.