Either in the spring or just before the season starts, it’s become a tradition for various people to write an article about how long Coach K will continue to coach.
General answer: as long as he wants. Daughter Debbie’s answer in a book a few years ago, not an exact quote but essentially correct: “I sort of hope he coaches until he drops.”
Obviously that’s a child who knows her father loves what he does and is said with respect and affection.
Otherwise it’s a subject of endless fascination for some people. Matt Norlander has his take with the Five Most Likely Replacements angle.