Linux is mostly GPLv2-only. Parts of it are under MIT, BSD, or even GPLv2-or-later, but the whole work is GPLv2-only. I wish you were correct. Hypothetically t

Linux is mostly GPLv2-only. Parts of it are under MIT, BSD, or even GPLv2-or-later, but the whole work is GPLv2-only. I wish you were correct. Hypothetically there could be a new version of the GPL that is crafted without any CDDL incompatibilities and we'd finally get to import ZFS into Linux, but alas, even if a GPLv4 came around to do that, Linux wouldn't benefit.