Diversifying the fab locations has no profit or business motivation. Seems to me the only reason we are doing it is to make it "less risky" to start a trade war.
The problem is a trade war will never be "less risky" for any country than the kind of nice, harmonious, trade we've had with China for the past 25 years. Its kept U.S. inflation low, enabled massive technological and manufacturing advances, and has lifted hundreds of millions of people into the middle class.
Its one of the best things that's ever happened in history. Why are we so eager to throw all that away?
Frankly, instead of making it easier for everybody to pick a fight with each other, it would be better if we just remember the fact that we actually are friends.
I love being able to design a circuit board, hit a button and have it manufactured in China and delivered to my front door in 5 days for $25. Let's just all go back to making money hand over fist, what say?