Why do many articles in the "Application of Foreign Civil Legal Relations" change the connection point from the law of the home country to the law of the place of habitual residence? What are the ben

Why do many articles in the "Application of Foreign Civil Legal Relations" change the connection point from the law of the home country to the law of the place of habitual residence? What are the benefits?

Because modern society is highly mobile. For example, A was born in the United States and his parents are both Americans. However, A lived with his parents in China not long after he was born and speaks Chinese better than English. A’s nationality is the United States, but because he grew up in China, he has always regarded Chinese law as the standard of conduct. At this time, it is obviously unreasonable to use his home country’s law—U.S. law—to judge whether his behavior is illegal.

The advantage is...it greatly improves the rigidity and unreasonableness caused by using nationality as the connecting point = =