[arch-general] ZFS in repos?

ZFS is in AUR. I wonder what is the reason why it is not moved to the Arch repos? The zfs-linux package has 250 votes, the zfs-dkms has 137, and the zfs-linux-lts has 70. I am aware about the possible license incompatibility between the kernel which uses GPL2 and ZFS which uses CDDL, however even Debian which is strict about several things such as what is 'free software', has ZFS in its main repos.