It's easier to hire linux kernel devs, there's more documentation, tooling & examples, device drivers & filesystems are more widely available, etc. Every other

It's easier to hire linux kernel devs, there's more documentation, tooling & examples, device drivers & filesystems are more widely available, etc. Every other OS has to play catch-up. They either need a killer app or lots of funding, or else they'll be stuck in a specific niche.