Because you wouldn't have to code all these drivers to make the result an useful OS? Writing a driver framework compatibility layer is quite a separate and doa

Because you wouldn't have to code all these drivers to make the result an useful OS? Writing a driver framework compatibility layer is quite a separate and doable activity from adopting an entire kernel. Haiku actually does have some FreeBSD driver compatibility, and then efforts like DDE have been around for running Linux 2.6 drivers on other systems. More recently rump kernels. You're being rude. You're being ignorant. Well its depends whether your goal is to have an OS running in very few configurations or if your goal is to have an OS which is able to be run by many. Absolute nonsense, as elaborated above.