He is also wrong. Saying "KVM runs on top of QEMU" is a very funny way of looking at it. And the claim that QEMU backs Google Cloud or AWS or Azure(???) is just plain incorrect. Not downplaying Fabrice's contributions - this tweet is just dumb.
It's an AI generated profile that posts this kind of slop weekly about popular developers and entrepreneurs. The type of feel good shit that makes the front page of social media. Not even Carmack is immune.