In conducting some recent research on cold weather insulation, I came across a very interesting forum debate dated way back in August 2009 on UQ length. I only attached Pan's remarks as I found them substantive and well reasoned. Insulation design and techniques have evolved since 2009 but I concur with Pan on this issue and believe it is more about simplification and still achieving the end result - a comfortable night's sleep.
Sometimes, we "gear lovers" over do it to the point our packs are heavy and setting up becomes a tedious chore with constant fiddling in the middle of the night. Then again, some enjoy the tinkering hence the "hike your own hike" (carry your own gear) philosophy. The full thread link back follows:
What's everyone's thoughts?