What are you talking about? That transition has been happening for a few years. 2007-10, every edit was literally a contest to do the most switchups on a flatbox.
The last two seasons have ushered in the popular opinion that hopping around on rails like a kook just isn't that cool.
Granted, there are people that always felt that way and people who have been skiing in a....shall we say...less busy fashion? for years, but it's been fairly recent that you see more and more people getting away from switchups. This phenomenon is particularly true in park skiing.