the threat is so old now. there are some running jokes in Taiwan like "China threatening to invade Taiwan since my grandpa is alive then my father. I hope I get to see it before I die". a lot of Taiwanese already numb to the threat.
did South Korea stop everything whenever North Korea did a Nuke test?
American can throw ton of money into the semis industry like China big fund. maybe throw money at Intel, free money to companies like TSMC or Samsung to setup more fabs in the US or throw money at a home grown semis foundry?