> The main effect is that we should not buy key communication equipment from a country we cannot trust.
We should not buy anything that is internet connected from a country we cannot trust.
We should not buy anything that is internet connected from a country we cannot trust.
We should not buy anything that has non-dumb components from a country we cannot trust.
We should not buy anything that is has high-performance materials that cannot be non-destructively tested from a country we cannot trust.
Overall, we should not be buying ANYTHING AT ALL from a country we cannot trust, as literally any trade merely supports their working against our well-being.
The grand experiment was done, and it failed miserably. We all thought that increased trade and information flow would bring free markets and democracy to the autocracies of the world. We could not have been more wrong — all we did was further empower expansionist/imperialist regimes. Russia is now waging a genocidal hot war in Europe and China is more actively threatening Taiwan than at any time in at least decades, and putting Uighurs in concentration camps - all funded by our purchasing. It is past time to embargo them.
Easier said than done when they are the dominant or at least major supplier of many strategic materials. It will take time to find economically viable alternative suppliers. Globalism is rapidly collapsing and China won’t for long be able to remain a reliable trading partner even if they desperately wanted to be, so we ought to be urgently securing sufficient alternative suppliers anyway.
That said, you are absolutely correct that it'll be a heavy lift to find alternate supplies of many materials and items.
That makes it no less necessary.
Germany had made apparently catastrophic reliance on Russian NatGas, and looked like a horrible winter. Yet they have extricated themselves within 10 months so much that even without that Russian supply, NatGas prices are actually falling going into winter.
It is necessary.