It's Hacker News, a lot of people probably know. I didn't, but he has a Wikipedia page so whatever.

Google has been bleeding talent for decades, though few people have ever heard of them before they left google. Like when John Giannendra left it was the first time I'd ever heard of him but it was made out like he was a key person and big blow for Google. Every self driving car company came out of ex Google people as well, same w/OpenAi. The thing is Google research orgs have always been much bigger than any competitors, they'll be shedding people forever but there's a lot more where that came from