I beg to differ.

I crashed the VM within twenty minutes of installing C6.  Over the past several days of modeling (please note, I have been using this software from Ray Dream 3d...RDD3d, RDS4, C1, CS2, C3, C4, C4p, C5p, now C6p) I have crashed the software during vertex modeling over a dozen times.

I have crashed it on two different computers, with entirely different video set-ups; one a desktop with a Radeon card driving an HP widescreen monitor, the other a stock laptop.

There are operations in the vertex modeler that are simply too error-prone to engage in.  Chief among them are any operation with polylines that does not involve lathing or lofting them the moment they are created (and lofting has, itself, been proximal to several crashes.  As has lathing).