IMO, poor marketing and terrible UX.  It&#x27;s the same reason Solaris zones never got popular.<p>I tried to use zones many years ago..<p>For &quot;isolated services&quot; I mostly ran things like debian VMs with 128M of ram and 4G of disk space.  In theory zones could do that too, but solaris was fundamentally incompatible with the idea of running a tiny &#x27;container&#x27; with only the software that you needed installed.