I never upgraded, not going to until I'm ready to switch up my gear. I kind of have the if it isn't broke don't fix it philosophy when it comes to computing. I used to be all about the near bleeding edge, but now wait it out to see the results of others, or not bother if the set up is running proper.
The day is coming though that I bother to start putting together the new rig, then I will be trapped into 2.5, by then I hope they will have it sorted.