Fascinating thread, Angie. Neither my husband nor I, Gen-xers, are big on jeans. He hasn't owned a pair in years and much prefers work pants, Carhartts, painters pants, khaki shorts in the summer, that sort of thing, and won't even try jeans on. I am willing to give jeans a go now and then but because fit is an issue no matter what size I am I do find them challenging. I agree 100% with what you said in your post today that they're a great way to dress fancier things down and that's what's keeping me looking.
I am trying a bunch of jeans on right now after years of not buying any and am shocked at how much the fabric has changed. To me jeans means something made out of 100% cotton denim, a rugged casual pant inspired by vintage work pants. The newer jeans, I've tried on - even supposedly quality jeans - are a lot thinner and more plastic-y feeling than I remember jeans being. A lot more cheaply made and fake-seeming. Self-consciously sexy. It's like they look like denim, but don't feel authentic to me.
Of course, these things are cyclical, but I'm wondering if fabric quality could be feeding the trend you're noticing?