I hope the NI LabVIEW sales department didn't went to the Business of Software 2009 conference and saw this (great) speech by Joel Spolsky.
Every version of LabVIEW going back at least to 3.0 has had a bug fix release. There's nothing new about the 2009 one except that we called it a service pack. It's curious that you mention 8.6's stability. By the CAR count, 2009 was more stable than 8.6. But these sorts of things are subjective to the parts of LabVIEW that affect you daily, so different customers may have experiences that vary greatly from the objective count.
In case you haven't heard, LV 2011 is going to be largely a stability release. The entire LV team, acting on requests from customers, is going to pull back on features, focusing on bugs, performance and integration between existing features. There will be very little that is new in LV 2011, but we think customers will want it nonetheless.
The following still is at 25:31 and I quote:
The correlation between features and sales is