I disagree. ZFS is great on Linux. The killer feature of FBSD is its simplicity and lack of incoherence in focus, which all the Linux distros suffer from. People don't see to be able to differentiate between these issues: Linux distributions' diversity of features and options is not a problem - it is the lack of focus & coherency of their management. This makes it harder to help other people on the same distro, to collaborate about bugs on the same distro, etc... Then you read an OBSD/FBSD thread from developers who aren't really better than developers on Linux threads - and you see much more coherency; because of the coherency in the systems they're working on.