Thank you for your detailed and informative answer Michael. I appreciate you taking the time to answer my questions.
I knew MoI is a NURBS modelling app, but I didn't realize that polygons are a "non issue". I thought it was a way of bending and twisting the polygons, in order to fit a curve between point A and point B. But now I know better ;)

I am seriously considering buying MoI. I love what you've done here, and you deserve all the credit in the world for it. Unfortunately I'm under a tight budget at the moment. So until I win the lottery, I'm trying to figure out the pros and cons of the different softwares out there.

Another question comes to mind: Sketchup isn't using newer hardware to its full potential, and this also leads to the dissapointing performance. 64 bit proccessor technology is not utilized, and google has failed to upgrade it openGL engine.

How does the corresponding situation look with MoI?