Old Iron mainframes are deeply misunderstood and rapidly getting a bad press.
Through no fault of their own and without good reason.
They are still current technology- or can be made to be so, but they are not and are unfashionable. For years they have sat there doing their stuff reliably 24x7 365 days a year. Because they never went wrong the army of people that kept it that way was deemed unnecessary and expensive - the skills diluted or even removed entirely. Investment in their operation and updating removed.
To the point where no-one understand what the hell they do, how important they are or how to fix them.
Suddenly it goes wrong - surprise surprise - recovery is unknown territory.
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