Eh, that might mitigate some of the damage, but the older the system, the more quirks and workarounds there are that are not documented anywhere and for which t

Eh, that might mitigate some of the damage, but the older the system, the more quirks and workarounds there are that are not documented anywhere and for which the required knowledge only exist in the minds of the current programming team. I don't see how any team of consultants can protect against that in a case of emergencies.