If China wanted to take Taiwan today, they could. The only question is the cost. I doubt the US or any other country would step in to defend Taiwan. But I would expect (hopefully) to see China get the Russia treatment and see some serious long overdue decoupling start happening. Not only with the US but also Europe. Already, ASML will not sell their most advanced lithography machines (EUV) to Chinese companies. TSMC has them, but if China tries to take Taiwan to get them, I would expect that China will have a very hard time sourcing materials and machines to make semiconductors. They should be cut off from the rest of the world except for maybe North Korea (which is really a China proxy) and Russia at that point.
%%What if aliens lands in Moscow ?
If you think decoupling is something bad for China and good for the west, you get it wrong.
If that happens, no one benifits. The entire world hurts.
You will see US market plunge , just as when Trump announced trade war with China, US market plunged.
No I think US would really step in and defend Taiwan. Unlike Ukraine, US actually has a vested interest in Taiwan so it would not sit idly by and watch it being taken over by China without a fight and just instead impose some sanctions which would not be effective in China's case btw because China is so rich and is a completely self-sufficient economy even if it's cut off from the rest of the world.
You don't do business with someone who has threatened to kill you.
Headline: China's ambassador to the U.S. warns of 'military conflict' over Taiwan. (For some reason, this website won't let me post the link, but google that headline, it's an article from NPR).
And that's not actually the most threatening thing they have said over the past few years. Depending on China has weakened the US. They got stronger at our expense. Standard of living in the US was better before we started trading with China.
Your statement is simply not true.
China is not launching a war with US, it may have a war with Taiwan. But if US wants to join the war, that is its own decision. But I don't think US will do.
If there is a war between China and Taiwan, both sides deem the war as a domestic war. There is no logic for a foreign country to join this war.