>DTrace, ZFS, Jails, performant TCP/IP stack and many other things where FreeBSD benefits the users. Just to point out, that DTrace and ZFS are (were) not BSD

>DTrace, ZFS, Jails, performant TCP/IP stack and many other things where FreeBSD benefits the users. Just to point out, that DTrace and ZFS are (were) not BSD features, and were not invented by a Open Source BSD. It just happened that they were open sourced by a GPL incompatible license (CDDL) which makes it impossible to directly merge it into the mainline Linux kernel. EDIT Just also to point out that had ZFS been a BSD licensed tech, it's very likely that ZoL would have been just as good an option as ZFS on FreeBSD.