I see Vista characterized as a failure over and over again, and Win 7 as a success. Win 7 is somewhat better than Vista, but the distance between them isn't that great. Besides the fact that UAC prompts were more frequent in Vista, was there some particular problem with Vista?

For a year or two there I was running workstations with both, and didn't see much difference.

I think Vista took the heat for imposing security where none existed.