when i interviewed with nvidia they said they aimed to be the kind of company where people stayed forever and worked on long term projects. ultimately the interview process moved too slowly for me (i had been laid off and needed to find and accept another job fast), but i was impressed with everyone i talked to and would believe that that was not just a pitch but actually reflected their values.
I've heard they retained well, and basically took the forefront in both AI and GPU vending in general. That plus the specialized knowledge needed to work with such tech leads me to believe that claim. They'll be stable for decades unless something catastropic (depression level) happens.
