Back in 2003 we had Solaris Zones (now called Solaris containers). Same concept as Docker, but we didn't knew exactly why it was such a good idea, and the hardw

Back in 2003 we had Solaris Zones (now called Solaris containers). Same concept as Docker, but we didn't knew exactly why it was such a good idea, and the hardware was expensive. What made Docker spark was being abke to use commodity hardware and ush to production with the same exact environment and behavior. You could have done the same with Solaris, if you developed on a Sun Ultra5 workstation and published the application in a zone in the server. But 2003 was a different world and not everyone had a Spark box to develop nearby.