I see there's a full-on diss battle going on here. Honestly, I don't get why you've personally jumped into this criticism. Plasticity might appeal to some people and not to others, just like Moi3D. I own both programs, along with Blender and a bunch of other 2D and 3D CAD software. Every app has its strengths and weaknesses, but there's no denying that Plasticity is an extremely powerful tool, and for someone like me who's used to Blender, the switch is pretty straightforward, they're just different philosophies and approaches.
Plasticity has made huge strides in a short time, and even the early versions could produce great models. It's only been around for 3 years, which makes it really young, even though it uses one of the most established geometric kernels out there. Plasticity already has a ton of features that people have been begging for in Moi3D for ages, especially when it comes to NURBS surface continuity, plus a proper advanced viewport.
I use both programs together in a complementary way: I do certain things in one and other things in the other, same as with Blender.
This field is growing fast and there are plenty of competitors out there.

Cheers