Geni, sorry but there is a difference of their being a backup within the WMF of Commons and there being a dataset of Commons at the IA that is not current. People can do all the analysis they want on the old data and it will not make any difference. It will not make the data that is currently in Commons any more accessible.
We have been told repeatedly that the data at the WMF is secure. Beyond that the data is like knowing what the maximum is the insurance policy will pay. You know it will be not enough. It is however very much a hypothetical question. How to make Commons usable is an here and now issue.