There are small factories - everything from workshops to industrial estates - all over the place. If anything it's much better now because CNC machines and lathes are cheap, widely available and very versatile.
Yes, they're cheap and widely available. That's because we import them from China.
If your plan for resilience against a long-term disruption of global trade has a critical dependency on global trade, you may need to rethink it somewhat.
If your plan for resilience against a long-term disruption of global trade has a critical dependency on global trade, you may need to rethink it somewhat.