Hello Fred vS!
I have a lot of plans, but I understand that they are not given to all true.
The current speed of development shows that even simple things are done slowly.
I'm looking а ACIS format for 3D, but such things do not write alone not professional.
On the other side is not sophisticated 3D formats (not solid) can be fairly easy to add right now, but I do not have plan on this at the moment