And it’s also very obvious that restricting exports will only help in the short term, and in the long term, gives China reason to develop their own tech.
The biggest constraint in AI is energy, not hardware. You can always throw slower hardware at the problem, just have more of it.
Energy is the hard part, and US is deeply behind on that.
China already has reason to develop their own tech, and is actively trying to do so. Availability of US chips will not change that.