Not sure why this was downvoted when it's objectively true. The Linux ZFS support is functional, but lacking. It's missing NFSv4 ACL support. It's missing pe

Not sure why this was downvoted when it's objectively true. The Linux ZFS support is functional, but lacking. It's missing NFSv4 ACL support. It's missing per-dataset user and group permissions, forcing all operations to require root privs; on the other systems, the ZFS tools work for all users, with appropriate checks. No delegation of privileges e.g. to allow users to perform admin actions like snapshotting, send/recv. No transparent NFS export. It behaved badly when a disc glitched, requiring a reboot to resolve; the tools started getting stuck in D state when trying to investigate the fault. And just a few weeks ago it refused to mount all my datasets until I changed the mountpoint (for no discernable reason). FreeBSD and IllumOS provide a more mature, well integrated implementation.