Semi-offtopic, but in the article, they link the reason why Ubuntu considers it legal to include binary ZFS:<p>> The CDDL cannot apply to the Linux kernel because zfs.ko is a self-contained file system module — the kernel itself is quite obviously not a derivative work of this new file system. And zfs.ko, as a self-contained file system module, is clearly not a derivative work of the Linux kernel but rather quite obviously a derivative work of OpenZFS and OpenSolaris.<p>This makes lots of sense to me as a layperson. Can anyone explain what the counter argument is? If a non-GPL binary zfs.ko isn't allowed, why is a fully-proprietary Celeste.sh (a commercial video game) okay? Because Celeste has fewer privileges?