I would think if you are a European national this situation would have a silver lining in perhaps incentivizing European scientific investment to remain at home and strengthen those nations' scientific research institutions and grant programs. If the U.S. sees fit to rework its institutions, that's its own business. If funding in the U.S. dries up, then doesn't it make sense to go your own way and seek funding in your home country?

So I think you're right. This could be a big opportunity for countries to poach some of these scientists or to repatriate those scientists who have left their home countries.