Earlier quoted context omitted.
On a side note, I think that Vista wasn't necessarily unpopular, it just had a good upgrade path/incentive for users (unlike XP to Vista).
It was one of the least popular versions of Windows, no? Certainly its market share never exceeded XP's.
The upgrade from XP to Vista meant a lot of software stopped working, especially from a driver perspective. If you're using some niche software that "just works (tm)", why change? Especially if it costs a lot of money to upgrade or your system isn't networked. The UK tried to upgrade its XP running backbone years ago, failed - and still got billet £10+ billion.