Comment by gigatexal

Mainframes are completely different beasts though. A VM on a Xeon machine is not a fair comparison to an app running on a Mainframe because by design the mainframe has many redundant systems to stay online for ever. Lots of dedicated hardware for things and redundant systems etc are the selling point to mission critical hardware that is the mainframe

I suspect this is more about not having to pay IBM for the hardware and contracts anymore