Earlier quoted context omitted.
It would no doubt be disruptive, temporarily. And it would also prompt a multi hundred billion dollar redirection of investment into moving those supply lines to other countries. Vietnam would love to get some more of China's tech manufacturing action, as would a dozen other developing countries. Others would welcome gains to be had in apparel or autos by moves like that by China. One of the biggest problems China ha…
The manufacturing ecosystem in Shenzhen (for example) is unique. Any individual element of it is probably replaceable (at a considerable cost), but the presence of all those elements in the same place is not. The agglomeration benefits of this are HUGE, and losing them would introduce a thousand small frictions into the manufacturing process. Issues that can be sorted out in hours or days in Shenzhen (finding alterna…
I’m sure there were synergies in steel and auto production in US cities connected by rail between Pennsylvania and Michigan.
I’d say the key misunderstanding is that you’re conflating China with “markets” in “it took China roughly two decades to build this kind of ecosystem.” If you read it as, “Markets took two decades to build this kind of ecosystem,” it should be clear that the relationship between prices, time, volume, supply and demand aren’t determined by political prerogatives, but by market ones.
In other words, if your thesis is correct (that there’s something special about Shenzhen), the thing that’s special about it can be reproduced elsewhere. It will probably happen faster than two decades, because it’s proven to be a lucrative setup.