Archicad and Vectorworks are under the same owner. If they merge these programs then I am a lifelong customer. Otherwise I am switching to Revit, and I have loved Archicad for 6 years now. The main reason being Archicad's weak modeling capabilities.
Things that archicad needs:
1. Image or 2d line work as a filter option to be seen in 3d window.
2. 3d lines
3. NURBS MODELING (sweep, loft) not the damn profiler
4. Curvilinear walls that don't segment
5. 3d editing capabilities such as making a diagonal wall with out creating a roof to cut it to.
6. Manipulate Z axis of bottom mesh points.
7. A pen set which allows you designate color and weight independently
Vectorworks has all these abilities. But it lacks a whole lot more than Archicad.
