Being paid handsomely to volunteer
It's all a matter of perspective. Starting next month I'll be able to work three 8 hour days/week on my glide path to full retirement. Been FI for a while, but I really like what I'm doing (nice work environment, low stress, personally satisfying) so no urgent need to stop. If I was truly retired I'd probably find some interesting places to volunteer a couple of times a week anyway, so might as well get paid to do something I enjoy.