Assuming a significant portion of people on this forum live in Europe, Canada or America. How many is willing to pack up and leave.
For many younger generations that I met in recent years, many of them do want to go back to China and most of them did. Often it is their parents that want them to stay in the US. EU, Australia, Canada, or New Zealand.
As for many others, no one can speak for others. Many Asians and Chinese Americans view the US as their home and want to stay here and contribute.
For others, they have a career and many assets in their host countries that it is difficult for them to simply pack up and leave.
For some, leaving is not a problem and can do so in any minute when they perceive staying is no more beneficial and danger.
However, it doesn't change the fact that the US has become much more danger for many Chinese Americans. And many of them need to change their living pattern such as no more subway commute or avoid jogging and running in certain area.