Well, why do you use it?
The most users I know started with Rhino, because it is so damn easy to have a fast look at what you are doing. If I have to use complicated short-cuts, or worse, mouse-clicks at an icon to change my view, that’s for me a show-stopper to begin with. If I make a curve, then a second one to create a surface, I want to be able to go around it with my view as fast or faster then going around a clay table. The programs you mentioned aren’t to compare with Rhino in other aspects, simply because Rhino hasn’ them. Rhino hasn’t FEA, or is able to more or less run a production line. It has something of all of that, but rudimentary. And that is not neccessarily bad for a sketchbook. For example, I love the fast surface analyses like curvature or zebra… And. When it lost its Parasolid Kernel, it became less comfortable in some areas. But that’s another story. I think, most of the guys over the years couldn’t, but use some other software with it, depending of what one does. But, really, compared to the prices of other soft in this sector, or|and the impudent annual price schemes that are becoming hip these days, for commercial users, Rhino is something everyone should have on his desk. Well, I’d have about some dozen ideas what to improve, but even that is another story. BTW, ok, I do not know, how long is the comm lag with the developers these days, but Rhino was the first of all, I believe, not only 3D programs on this planet, being developed with intense feedback from users all over the world. Beta testers. There was an idea. Three days later, it was implemented. Well, enough of that dribble.