Which countries would benefit most from an American brain drain?

Most of our “brains” are mercenaries, who are actually a net loss to the country if you judge by anything other than the stock market. Look at what happened to SoCal! You are all welcome to our fintech/biotech/adtech/surveillance “geniuses”.

Since you don’t appreciate any of the comforts of modernity, I’ll put this is framing you will understand: The killbot drone race is inevitable and not one you want America to lose.