Your statement was that "microchip manufacturing has (ironically) hit it's the technological limits". Which, of course, I have demonstrated to be objectively false.
It's very simple: 5nm is far too close to the actual size of individual silicon atoms. Presumably you now would like to argue with the atoms themselves about how they are exhibiting the wrong dimensions
Do you understand what individual means, lol
"5nm is far too close" ... for ...
what exactly? What is it about 5nm that makes it "too close"? What occurs, or stops occurring at 5nm?
Of course I understand what individual means. A 5nm cube of silicon contains on the order of 12,500 silicon atoms. Still quite far from 'individual'.
But this is irrelevant. Again. Despite being irrelevant to Bitcoin, it neither brings an end to semiconductor scaling. As you keep missing, we are just starting to exploit the third dimension in semiconductor fabrication.
Sure, there will be problems at each process node. That will continue to be solved just like we've solved each process barrier for the last half-century. The only measure that matters -- the amount of computation one can do for a certain amount of money -- will continue to climb unabated.