I think many Nvidia employees will stick around because their new found wealth being at the biggest most important company in the world will give them insight about the market they invest in. I make an order of magnitude more day trading than as a software engineer at a Mag7 company and I stay employed for the access to they way modern businesses think. Companies like mine are an amalgamation of management and engineering from other Silicon Valley companies so the tribal knowledge gets spread around to my neck of the woods.