For a fun hypothetical, I think this about each:

Bezos: Pushed the button on society ending himself, instead of mocking as king of a new society instantly became the biggest warlord in the states.

Gates: realized he was too old to play warlord. Forfeited his fiefdom to be advisor to Lord Bezos.

Buffet: Tried to keep some society going Vault Tech style. Waterchip breaks barely a generation later and they’re forced out into the wastes.

Elon: was gloating at Twitter HQ when it all went down. His visa employees took turns stabbing him with ballpoint pens immediately.