In general what do you use these for?
As Will mentions, it was to thin to be a good insulating layer for sedentary activities in cold weather, like sitting around eating breakfast on belaying a climber.
At the same time, for active pursuits, wouldn't you rather choose a garment that manages moisture better like a fleece or synthetic hi-loft insulated garment?
I thought whole idea of modern apparel was to limit moisture build-up in the clothing system, to prevent even colder chilling when you stop moving.
Also at these super thin weights, does down realy provide such a benefit? If for example, synthetic insulation weighs 50% more for the same R value, then in a sleeping bag with 16oz of down, you save 8 oz, plus you don't sweat as much at night as when climbing up a mountain. In this jacket however, you only save 1 oz, and have to deal with the slow drying and poor moisture transfer of down.