Yep, I own V4, but to be honest I don’t think I’ll install V5 anytime soon. I’m currently really charmed by MagicaCSG, although that’s not NURBS / solids. 
Hahahah, I’ll tell MoI’s developer Michael Gibson that you’re calling his tool a Rhino ‘clown’. 
Interestingly, as you will undoubtedly know, Michael worked on Rhino before initiating MoI.
Definitely. I’m keeping an eye on its development. 
Me too. Way too much emphasis on the technical side of NURBS, making me miss the elegant UI / UX of a tool like MoI or Plasticity.