Yes, Solaris was doing "containers" in the mainstream before Linux but pointing that out as a response to articles like these misses the point of how and why Docker exploded; it was Docker's UI, the user experience and Docker Hub that really unlocked the full potential of the technology.
Solaris containers didn't have anything like Docker Hub nor was setting them up as easy as "docker run".
Solaris containers didn't have anything like Docker Hub nor was setting them up as easy as "docker run".
(Posting as ex-Solaris guy)