It is an interesting notion. For me, silnylon and the like are too new to know how they’ll hold up. But I’ve tried out gear from each ‘revolution,’ since the 60s. From my pov Cordura is a non-starter for a backpack; it’s fine for a duffle to carry heavy gear – climbing ironmongery and so fourth.
I still have (somewhere in my son’s garage) the prototype for the first backpack ever made by NF – I helped design it. It’s ordinary nylon pack cloth. I used it for years for everything from hiking and woods wandering to international travel and exploration. Used it to carry in 5-gallon water cans to an archeological excavation in Southern Mexico and to carry out over 60 lbs of artifacts. After a decade or so the zipper gave out – this was the first panel loader – and the ‘waterproof’ coating peeled off, but the fabric is as strong as ever. It weighs 2lbs.
With this pack, a Yucatan hammock, a poncho, a mosko net and a poncho liner my base weight, not counting clothing food, guns, machete, etc, was, I think about 6lb. When I was in the mountains I swapped out the hammock etc for a down bag. This was in the late 60s.
Heaviest boots I ever wore were jump boots, which were fine for jumping out of airplanes. I was thrilled when we changed over to the lightweight jungle boots, wouldn’t wear anything heaver except under duress. I’m not so sure adding more leather, or composites, makes for more durable. See my moccasin comments above.
Haven’t found anything with a better warmth to weight ratio than a down bag.
It’s all individual, but for me, no, my pack weight would not go back up. As a long practicing minimalist I just don’t carry much stuff.
What I’m looking for in the new gear is more comfort at less weight. Old bones, many miles on them.