As it is all the queries there are are external to Wikidata.. Speculating at this time about queries and Commons is futile.

On 19 August 2014 10:14, James Heald <j.heald@ucl.ac.uk> wrote:
Also there might be queries one might want to run on the categories, which would be another reason to include them in Commons Wikibase.

  -- J.

On 19/08/2014 07:00, Gerard Meijssen wrote:
I know the categories in Commons exist. I also know that you do not have to
add categories when an image is uploaded. Many people do not consider the
categories because they are just there and are not easy nor obvious without
a long study.

They are there and they evolve. When the "community" finds that they are no
longer useful, there will be others who still want to work on it. They can,
it is a harmless occupation. Why would we consider removing category
structures as long as someone cares about them ??

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