If there is a place to throw suggestions for future development ... here is one.
3D models of the PCB and all placed 3D components is the norm now in product design.
KiCad does a wonderful job of displaying the 3D PCB with 3D components.
However, the incomplete IDFv3 export provides no real value, other than a pleasing display of a completed project.
The real value in 3D models is for use in product design with the Mechanical CAD designers.
Collaboration with the ME using the 3D models saves tremendous time,and quickly ID's a good or bad fit.
STEP files are not easy received or used by Solidworks ... the IDFv3 files are ideal.
So ... yes ... I highly encourage KiCad to add "complete IDFv3 export" to the TODO list ... if there is any room left on the list.
Until this capability is added ... most true EE product designers will simply have to choose other software that allows for the easy collaboration with the ME. When "complete IDFv3 exports" are possible ... expect the KiCad user-base to grow exponentially!!!