As at now, Nvidia is too big to fail just because of one person living. That is not possible. My too big to fail could be over the bar, but you get the logic. The stock will surely regain itself back as a new CEO will enter and change the course of things.
It looks like that but, I won't be too confident of saying that. Right now, they're too big but with every company restructuring and kicking out of the key person for its growth might be a bad decision. While it's that condition today that we see because of how valuable the products they make but once a huge competitor comes out and everything they produce can be reproduced and way cheaper, we'll see its share drop a lot. China says that the only prove that Alice Huang is a spy of China is being her a chinese as they deny the allegations of her being their spy.