[zozbot234]

The basic point that older nodes are still viable and exponentially cheaper than newer ones (and getting cheaper over time) seems very much correct. It's not just the physical masks either; the design rules get simpler and more openly available the further back you go, and entirely open toolchains with negligible licensing costs start becoming viable as well. In fact, this might end up being the 'real' Moore's law, not so much the availability of more and more advanced nodes at the leading edge.