[rjmill]

I wonder if Bacardi might be a better analogue for what TSMC gets from this deal.

Bacardi started a distillery in Puerto Rico (iirc, to sell in the US without tariffs) well before the Cuban Revolution. When the Cuban government seized Bacardi's assets, they were able to move everything to their other sites in Puerto Rico and Mexico.

As you point out, I highly doubt this deal moves the needle on whether or not US provides military aid to Taiwan. But it does help give them more options if the situation in Taiwan becomes untenable.