Whilst cutting the wire will prevent superlock why is it thought necessary to do that?
My experience relates to the Lucas system but I suspect the details within the lock case are similar if not identical for both Lucas and Pectron systems.
I agree that if the lock on the passenger side ceases to function whilst superlocked then nothing that anyone can do will release the lock.
On the driver's side it is my belief that the key should overcome superlock (but you might need to disconnect the battery first).
If either lock has suffered internal component failure such that broken parts "jam up" a crucial part of the system or prevent a vital movement then it will not matter one bit if it is superlocked or not in my opinion.

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