Probably. File systems are hard to make sure to get just right. ZFS took just about 5 years to mature into a production release. From its inception in 2000 to

Probably. File systems are hard to make sure to get just right. ZFS took just about 5 years to mature into a production release. From its inception in 2000 to production release in 2005. Oracle's btrfs (their attempt at competing with ZFS) began in 2008. Still isn't mature.