the offshoring of manufacturing started in the 50s and 60s and accelerated in the 80s. the reason is that US wanted to do specialized high value manufacturing, and was offshoring everything low value and low margin, because of increasing cost of environment and labor regulations and unions.

My fear is that if US becomes hostile to foreign tech workers, they will simply create alternatives to US Big Tech in other countries and US economy will suffer.

Current US domination of global tech is partly because of foreign tech talent.