And this last 1Z generation is not even double the density of the prior one 1Y. If it's going to be the final generation, at least make it look like one last hurrah or going out with a bang, like 10-13 nm, and get more of your money's worth.
So finally, a company is giving up shrinking. Intrinsic variability at small nodes is a well know problem, and the complications in litho does not help. The return back to 40 nm to get 3D devices is certainly a milestone.