So I would say most folks saying the center tech will just move to Texas are discounting the needs for first generation immigrants to travel home to Asia Pacific as well as have a local support network.
It's trivially easy for Keith Rabois, Jason Calacanis or Peter Thiel to move to Miami or Elon Musk to Austin. It's another thing for Sundar Pichai, Satya Nadella, Jensen Huang to move to Miami/Austin and feel more at home versus just staying put.
I use this as a barometer of first generation immigrant tech friendliness.
Also its not that it wouldn't be great if all places had built in support for first generation tech immigrants - its just not the current reality.