Well, XYZ rando going back to work after RSUs are vested is lot different from Google founder going back to work because he sees his 'baby' is in trouble.

Those hobbies, interests etc sounds like middle class thing where people take upon gardening, cooking, hiking, surfing or some such that they couldn't do enough while working. For people like Google founders they would've had any adventure they seek outside work anywhere in they world every weekend.

People forget Bill Gates advised (maybe still consulted) by MS long after he formally moved away from any official position in company.