Despite what IBM claims, COTS support for the mainframe is actually pretty limited (and often far more expensive), even if the MF is running zLinux. The mainfra

Despite what IBM claims, COTS support for the mainframe is actually pretty limited (and often far more expensive), even if the MF is running zLinux. The mainframe is also a huge single point of failure and failover solutions to a second data centre are again, really frickin expensive. I'm not a mainframe expert, but I'm not convinced by this story.