Coming from the perspective of having hiked with the same gear from the 80's until last year, I feel like I missed a lot of the incremental changes even though I certainly saw others' gear -- and I see it as quite a revolution in terms of both quality and lightness of gear.
In 1982, I was cutting-edge with my Lava Domes, Bibler, instep crampons and hexamine tablets under a Sierra Cup (well, in my mind)and now, all but one of those is pretty much "heavy and outdated" by common availability and use standards. Sleeping bags, jackets, stoves, cook kits, boots... all way lighter than in the past and in forms that folks well behind the leading edge are finding and using w/o realizing that much of what's the norm today was UL a few years ago.
Hey, I'm no Luddite: I'm using a Tyvek sheet under my Bibler this very weekend. Ho ho.