Until Docker is more robust, I would avoid RancherOS -- although I quite like the simple appeal of it.<p>Docker still has issues where the supervisory process can be badly behaved and having user-level services in a docker supervisor within Docker doesn&#x27;t fully insulate you from that.<p>Further, much of the functionality of Systemd is actually quite interesting in the context of a large cluster of machines and it remains to be seen if Rancher will fill the gap as well.