In publicly-traded companies, the board is not the ultimate boss, though. That would be the shareholders. And, at Meta and many companies copying Meta's playbook who have IPO'd since (notably including Anthropic, though notably not including Nvidia), founder shares have so much voting power that the founders are effectively in complete control.

In theory, Nvidia shareholders, if dissatisfied with today's decision, could vote to oust the current board and replace it with people more sympathetic to Huang, who would, as their first decision, re-hire him as CEO, as would be their prerogative. This is... unlikely to happen.

None of the above is investment advice.