Sometimes I need the heavier piece of gear. I remember my first goretex coat - had to take it campin of course. Trouble was when I got my second goretex coat and couldn't take both. Same with sleeping bags and tents, soon I had to decide to leave 80% of my camping gear at home - stuff that I paid thousands of dollars for. I can't imagine having one set.

I would wear completely different clothes for a summer or winter trip to the same place in the mountains. If my pack weighed less than 22 or 23 pounds I'd add a steak.
Jim