Thanks for the correction on RTM, Phil - was 4 AM here and wasn't paying attention.
Transition, while I loathed Vista (and still do), our definition on the word "failure" must differ. 140 million copies of Vista were sold between late 2006 and early 2008 alone.
I found Vista an unmitigated disaster, like most people - but by the numbers, it didn't do half as bad as people think it did. But in overall scope of things, you know your product is loathed when you are forced to offer downgrades to XP on machines that came with Vista pre-installed, so in that case it was a real shambles. Hell, I even "downgraded" a Toshiba laptop that came with Vista, back to XP.
I disliked Vista enough I almost made the switch permanently to Mac, in fact - but Win 7 is actually an excellent product. It's no Amiga OS, but for your OS for the masses offerings, it's one of the best I've used, Win7.