Sure, at least half of the FAANG use Linux. But they use a homegrown Linux flavor often maintained by an entire dedicated team. Not some random ass Ubuntu or Mint ISO you downloaded; these images are custom tailored to the workflows, dev needs, security needs, and even package management needs of the corporation. They often carry a complete profile template that integrates with whatever they’ve chosen to enforce authentication, have a lavish on-board remote monitoring system, you name it.