Firstly I have no idea what Mainframes "cant do real time" even means. They were the only way of doing real time at scale for years.
Secondly DevOps and Agile are methodologies and philosphies - yes there are some great toolsets as enablers but you could knock together a continuous integration framework for JCL if you really wanted.
And lets not get into how long Linux has been deployable on a mainframe.
Someone let the PHB talk to the press with out a minder. The whole article was semi-intelligible bullshit bingo.