Long-term independence and stability of Taiwan is a political goal, not necessarily a corporate one. The political-corporate relationship in Taiwan is definitely different (or of a different flavor) than that in the USA right now, which makes this harder to parse for specific corporate objectives. In the aggregate, this could signal a willingness of the government in Taiwan to make bets (assuming they have to approve of things like this, I'm not 100% sure if that's true) that the long term goal (political independence) is best served by further entangling itself with the US. That's probably where the debate should exist.
Long-term independence and stability of Taiwan is necessary for TSMC to keep existing. It's in its best interest to keep existing.
I'm pretty sure the government doesn't need to approve of this sort of thing; VIA got away with it.
Further entangling itself with the US would be keeping itself for the most part in Taiwan. "We have drastically better tech than you, and your military, intelligence agencies & universities really desperately need these!" is a fantastic incentive. "Here's a factory that allows the US to be pretty much self-sufficient and no longer dependent on us for the next few years while you haphazardly try and get on top of the world again" is not nearly as good of an incentive.
Taiwan gets invaded yesterday, suddenly the US is in a sticky situation. Taiwan gets invaded when this factory is finished? 5nm vs 2-3nm isn't a huge difference.
I suppose that doesn't really address your broader point though, which is a good one, that Taiwan does/did have leverage in this relationship with their higher-tech fabs being located within Taiwan exclusively. R&D will still be in Taipei, I imagine. Very quickly this becomes, in my mind, a human capital question.
Human capital creates a problem for Taiwan, because human capital is easy to obtain, and the US is really good at convincing the best and brightest of other countries to come to the land of the free, by coercion or just offers They Can't Refuse. This creates a kind of perverse incentive for certain pieces of the US government to hope the situation in Taiwan gets stickier, so they can offer a one-way ticket out of it for scientists they're interested in.
Hadn't thought of this. Still processing the thought. It reminds me of the US recruiting German scientists for NASA (absolutely not claiming that Taiwanese engineers are comparable to German engineers from Nazi Germany in any way shape or form). I'm expecting the TSMC fab to recruit local talent for operations, but I think you're right it'll definitely require some technical expertise that has to fly in from Taipei.
>If China can secure naval dominance within the second island chain
Skeptical that they'll be able to do this though, unless it represents a significant change in naval operations and they achieve this via drone or other submarine operations. PLA has had a difficult time getting the aircraft carrier concept to work, even after buying several Soviet era carrier vessels (if my memory serves). It might be a false signal, but that they haven't gotten the aircraft carrier concept to work (which would of course be required for an air bombardment of Taiwan) might mean they're working on other naval hardware that exploits US weaknesses, and thus crippling any US Navy activity via submarine or missile warfare in the Taiwan Straight is the ultimate objective for the above mentioned reasons.
I think the bigger problem is the assumption that Americans can properly safeguard Taiwanese IP. Anything you send over here you might as well cc: Beijing on the email.
What I’m talking about is the capability of instantly kneecapping the US tech industry. A sudden differential advantage created by denying capabilities to your adversary. That’s what makes the current semiconductor situation a geopolitical tinder box.
This should terrify the US, which is the ideal. The US needs to go to bat for Taiwan, which won't happen when they have less incentive to.
China is willing to take independent countries for lesser and pettier reasons than semiconductors. Look what they've done to Hong Kong. Taiwan's been a thorn in its side for years. Distribute it around, China will still want to take Taiwan, the US has less of a reason to go to bat for it.
On balance you may be right, because China’s desire to control Taiwan is not exactly the result of a rational strategic calculation. Interesting times...