Well written, I will add that it's pretty clear cut that zfs on linux would be a derived work of the kernel cause it has some differences specific to linux inte

Well written, I will add that it's pretty clear cut that zfs on linux would be a derived work of the kernel cause it has some differences specific to linux internals to make it work. That's why zfsonlinux only distributes module sources. Since it never distributes a binary, it can't run afoul of licensing.