No, it has not become the norm (except in the marketing of gear), IMO.
Last month my wife and I hiked almost a week with three relatives who were traditional backpackers: bro-in-law, his wife, and his son. My bro has been backpacking since the seventies both in the East and West. He is mid-50 like me. Wears the hiking boots, big pack, tent, bag, etc. Same with his wife and his son. His son has hiked with him before he could walk.
My wife was the lightest. A Zpack Z1, small pad (for frame and sitting), our water, two NeoAirs, two quilts, cocoons, clothing, and misc. Did not weigh her pack, but my bro picked up her pack and could not believe it. He said that it was like a pillow. She does not hike often. My strategy is "if she is happy, I am happy : ) ". She had no problems. Light is good.
I was next. With our food 21 lb (Bearikade weekender and a Bear Vault 350). 3.5 lb decrease per day as we ate our food. Pinnacle pack, DoubleRainbow tarptent, Steripen, SUL1100 pot, Snowpeak LiteMax stove, two poncho tarps, CoolPix camera, cell phone, two nesting bowls, two Trappers Mugs, two spoons, and that was about it. Felt comfortable on day one and then by day three became very comfortable.
The other three packs were what you usually see. We did not really debate pack weights at any time during the hike. I do believe that they were skeptical about us at first. After a couple of days, without arguments or debates, I think we showed three really good traditional backpackers that going light can be done very comfortably and safe just like traditional style.
It was a fun hike for all of us. My wife and I like the light and simple style while the others like doing what they are familiar and comfortable with. It really doesn't matter what others carry or do not carry. Everyone ends up doing what is right for them.