The new stuff is certainly thinner than it used to be. new MC2 is a good bit thinner than MC2 from even 5 years ago. The older MC is certainly much thicker than any MC2 I've seen. The new stainless-clad All-Clad varies depending on style and size, so it's hard to say how much it has changed. The new MC2 and the stainless series all works just fine, but so does my Sur La Table tri-ply, which is much less expensive. I do love the All-Clad handles, though, and I really like the polished interiors. I own two pieces of vintage All-Clad Master Chef, two pieces of MC2, several pieces of stainless clad, along with vintage Mauviel, Matfer and Jaquotot copper, modern stainless interior Mauviel copper, modern Baumalu 2mm copper, Viking 5 or 7 layer, whatever it is, Sur La Table triply, Paderno and deBuyer carbon, Vollrath aluminum, and all kinds of cast iron. It all has it's uses, and I like even the thinner All-Clad just fine, and use it regularly. I think my tri-vent handle Vollrath aluminum is probably my favorite, though, and it's cheap!