>> What do I mean by that? How about a couple of examples: It should not be an acceptable practice to just insert a CD and indiscriminately install software onto a production machine. Mainframe systems have well-documented and enforced change management procedures that need to be followed before any software is installed into a production environment.

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>> Nor should it be acceptable to just flip the switch and reboot the server. Mainframe systems have safeguards against such practices. And mainframes rarely, if ever, need to be restarted because the system is hung or because of a software glitch. Or put into words that PC dudes can understand: there is no mainframe “blue screen of death.” Indeed, months, sometimes years, can go by without having to power down and re-IPL the mainframe.

This can also be true for a standard cloud server running several web services or other processes. How are any of the author's points specific to mainframes?