I put "support" in quotes because to be honest, it's never been much of a concern. Even when I've found and reported bad behavior I'm told it "functions according to specification". A release being supported just means there will be periodic new builds provided that we can download if desired.
What I' really interested in is the day to day usage. For example, when we moved from Creo 2.0 to Creo 4.0, we found that the methodology necessary to do drawings became much more tedious. Every time an older drawing is brought up, if it uses datums, we get this annoying "warning" about legacy data. Which is a real pain to "correct". But mainly the workflow needed to do the same things we used to increased, in terms of the massive number of mouse clicks and menu perusals.
On a lesser level, is the Manufacturing module improved significantly in any of the later releases? I'm actually quite afraid that they will eliminate the Custom Trajectory path type, which I use immensely for roughing operations and particularly tricky finishing, too. The "canned" cycles are okay if you just want to chop out a volume and don't particularly care how it's done, but for efficiency on complex 3D contours I can define paths that give better results and are faster.
Anyway, that's what I was interested in. The actual workflow with the program. The supported thing is only the reason others in my company are getting squeamish about 4.0.
