Illumos and ZFS sounds completely sensible for a company that runs on specific hardware. They mention the specific epyc cpu their systems are running on which s

Illumos and ZFS sounds completely sensible for a company that runs on specific hardware. They mention the specific epyc cpu their systems are running on which suggests they're all ~ identical. Linux has a massive advantage where it comes to hardware support for all kinds of esoteric devices. If you don't need that, and you've got engineers that are capable of patching the OS to support your hardware, yep, have at it. Good call.