Without being too careless[1] I think it is plausible to assume they and their children will not "have" to work again. The "have" is in scare quotes because, in my experience with tech people I know who have 'banked out' of the workforce, working on something is often more rewarding, over a longer term, than sitting around consuming entertainment while eating and drinking. So nearly everyone I know who became multi-millionaires or beyond have ended up still doing something interesting with their lives.
So stepping down from FB is kind of a no brainer, especially if it becomes less "fun" due to issues raised by other people. Building stuff is fun, cleaning up a mess, is not fun. Trying to do stuff while the mess is getting worse and worse around you, that is pure torture in my opinion.
[1] There is a sad track of people who have made millions and then lost it all due to poor choices.
So stepping down from FB is kind of a no brainer, especially if it becomes less "fun" due to issues raised by other people. Building stuff is fun, cleaning up a mess, is not fun. Trying to do stuff while the mess is getting worse and worse around you, that is pure torture in my opinion.
[1] There is a sad track of people who have made millions and then lost it all due to poor choices.
[2] Billionaires actually -- https://www.forbes.com/profile/kevin-systrom/#3b19b6447396 -- or not -- https://www.therichest.com/celebnetworth/celebrity-business/...