For YEARS I have been wishing we could turn voids on and off via a visibility parameter in Revit Families. This would open up so many more possibilities for parametric families. As it stands, when I want to add a void to a family in some instances/types, I have to make a void floating outside of the family that only cuts the family when a distance parameter is adjusted so the void then overlaps with the geometry. This makes the family messy! Alternatively, I just make a new family, but with voids being able to be turned on / off, we could utilize the type parameters to a fuller extent, making more detailed families.
... Also, please can we join voids... In general, the void capabilities need some improving.