Is he particularly apt at leading/managing research teams? OpenAI's slow productization doesn't imply he's a product/idea guy a la Jobs.
Given they paid for a big stake in the market leader, and their stock price movements when this drama erupted, keeping these people in-house can be seen as damage control.
And once the AI bubble pops as everyone learns AGI indeed NOT 'around the corner', Microsoft will silently let him go with a golden parachute in the 8 figure ballpark.
At least that's what I learned from watching the Silicon Valley satire.
I know several people that keep changing company when their favourite leardership changes into another one.
If you are the lucky CEO of a company during the phase of success, investors will associate you with success. It's just easier to identify than understanding what the company does in detail and why it is successful or will/won't be in the future.
Good for Sam.