Absolutely nothing.

In fact, my gear choices actually increased my pack weight a bit. I've gone to mostly hammocking year-round, and the weight of the hammock, tarp, and underquilt for cooler weather use means an extra 2-3 pounds over the tarptent I so often carried.

But the quality of my sleep has improved so much that I am glad to carry the bit of extra pack weight.

Other than the hammock gear, I really haven't thought much about gear this past year. I'm spending too much time on the trail to worry about gear.