"Wrong. It's nothing to do with patents. The GPL is hostile to more-free licenses like Oracle's CDDL. Look, I hate Oracle too, but they are doing nothing to hinder anyone from using ZFS. FreeBSD is your clue to the truth of that".
^ Exactly this not least because there still appears to be some confusion between current proprietary ZFS as amended by Oracle and OpenZFS which is covered by the CDDL licence. Not even litigious Larry would succeed in a challenge over the use of OpenZFS because any court would almost certainly also take into account the intention of the original Sun Microsystems developers when they applied that CDDL licence.