For myself I prefer having the extra space for the very slight weight penalty. The design and “features” of a bag have a lot more to do with the weight than the extra material (a good example is the kifaru muskeg line, the 7000ci is 5.2oz more than the 2800ci). The volume I need for a 5 day early september hunt is maybe half of what it would be as compared to a 5 day november hunt with taking a warmer bag, warmer layers, different tent, etc. There’s always the guy who can do a 15 day hunt from a fanny pack and guys who use up all 10,000ci for an overnighter but aim somewhere in the middle and youll be ok.