Re: Don't blame users for the UI
when did you train people going from XP to 7 ?
There were sufficiently few changes to the UI that required a large amount of retraining in the general workplace when shifting between systems prior to Windows 8. Every version from W95 up to W7 was an evolution, not a paradigm shift and the changes that did occur were more of a problem for support than for users. Even on the support side things weren't that bad.
The only big problems tended to be where applications broke because of underlying changes made by Microsoft, and even there it was often something that could be worked around except on a few occasions where the software itself was heavily flawed (so-called "dirty coding" has always been a problem and not just in the world of Microsoft).
So training was quite often trivial as long as things weren't mucked about with too much. In my experience of XP to W7 rollouts, very few people really noticed much difference in what they were doing. W8 and W10 broke all that.