As I understand it, Stack Overflow is about the future, which means suitable searches, and searching in multiple tags is tedious.
The whole MS Access area is pretty small and MS Access is a smaller part off that. There is no point in having not only tags for every edition of Access, but also tags for every version of VBA. A great deal of VBA is common to all Office applications and most MS Office (all?) can be referenced from each other, so all VBA is relevant to a VBA search.