Most folks who are part of the startup, don't care to stick around for the scale. Different phases of the company tend to attract different types of people.
Not supported by Ilya agreeing with board to fire Sam Altman.
I also think you'll struggle to find a majority of people thinking AI research's "ceiling is proving to be lower than originally hoped", what with 4o, SORA, GPT5 all coming and it's only been 1.5 years since ChatGPT.