I wonder how much suffering would be alleviated in most mid-level IT organizations if they just used Joyent/SmartDataCenter, and I say this as a FreeBSD developer with no affiliation.
zones in SmartOS provide full-blown UNIX servers running at the speed of the bare metal, but in complete isolation (no need for hacks like "runC", containers, or any other such nonsense).
Packaging one's software into OS packages provides for repeatability: after the packages are installed in a zone, a ZFS image with a little bit of metadata can be created, and imported into a local or remote image repository with imgadm(1M).
