"Rock's law or Moore's second law, named for Arthur Rock or Gordon Moore, says that the cost of a semiconductor chip fabrication plant doubles every four years. As of 2015, the price had reached about 14 billion US dollars."
It seems likely that we're relatively close to the point where it will no longer be economical to push the limits here. It's unlikely that even the entire world working together would want to spend more than $1T for a single fab, which Rock's law suggests is less than 20 years away.
https://en.wikipedia.org/wiki/Moore%27s_second_law
It seems likely that we're relatively close to the point where it will no longer be economical to push the limits here. It's unlikely that even the entire world working together would want to spend more than $1T for a single fab, which Rock's law suggests is less than 20 years away.