Fidji Simo (who was 1-2 levels under Sheryl on the org chart) is now the CEO of Instacart.
People in this thread are dramatically underestimating the position and compensation she just left.
Unless an exec is fired for financial fraud or serious misconduct (and even the latter isn't always a barrier, there are many counterexamples) they'll pretty much always find another role of equal status, if maybe not equal comp, if they want it.
Marissa Mayer is running a startup lab now, Amit Singhal is doing philanthropy, Travis Kalanick is starting ghost kitchens, Eric Schmidt is also doing philanthropy plus venturing into politics & punditry, Andy Rubin is a venture capitalist, Chris Sacca retired to Montana and occasionally appears on Shark Tank. While they may have the skills to take lower-level corporate jobs, the folks who reach those levels generally don't have the personality or inclination for it.
https://www.vox.com/recode/2022/6/9/23160588/eric-schmidt-am...
When you're that rich you buy insurance policies so that if any one state goes down, you don't go down with it.
Are they really though? To take just one example, Sheryl Sandberg would still make a perfectly good senior product manager or something. Lots of places would hire her and it has great wages and benefits (by the standards of us mere mortals).