Doesn't eliminate them, but as a sysadmin doesn't have to worry about what version of it or even if runtimes such as ruby/Java/Python exist, any devel libs, exi

Doesn't eliminate them, but as a sysadmin doesn't have to worry about what version of it or even if runtimes such as ruby/Java/Python exist, any devel libs, exist in the machine. That same container can move from my desktop to any environment.