> "There's a huge chasm between using Xsan over Fibre Channel and a USB drive with Time Machine," Brady told Ars. "That middle piece is what we're looking at—users that want the convenience of a device like a Drobo, but with more reliability and [easy verifiability]."

So, ultimately, this is a hardware play, then. That makes sense, because most of the features of ZFS don't add any value to a Mac with a single internal drive and at most one or two USB drives, which is how almost all Macs are used.