OKay, first of all you have to understand that when ExoCAD is paird with a system, each different manufacturer (zirkonzahn, origin, kavo, etc) tweaks the program to their own system.
I'm sure you could mill out a hybrid on an open exocad platform, but i'm not sure where you would get all the compenents to do that. It's kind of unique to the zirkonzahn system. I suppose you could use a double scan and throw in some implants... but that kinda defeats the purpose of buying a CAD program. You want to be able to design from scratch.
All of this CAD stuff is still so very new and has sooooooooooooooooooo much catching up to do. Read all of the posts on here and you get the feeling of how this technology is not quite there yet.