Let me see if I understand what this is. It used to be the actual feature size which was quadratically proportional to transistor density. Once feature size s

Let me see if I understand what this is. It used to be the actual feature size which was quadratically proportional to transistor density. Once feature size stopped being meaningful they continued using it by extrapolating from transistor density, ie whenever they would quadruple density they'd half this massive number. This, therefore, includes innovations like finfets and other " 2.5D" technologies Is that largely correct? Because it's gross.