Perhaps we should understand what "integrated" means. Paraphrasing the dictionary, connecting two or more elements is integrating. It would seem that connecting a GPS does not define the system as integrated. If two instruments can "talk" to one another they are, by definition, integrated.

I agree with Will. When our rules were first written the instruments now available to us were only a dream. Their relative cost to 25 years ago is not that much. If we were to remove the prohibition of integrated instruments it could be a move to modernization of our class rules.