What's the difference between traditional Sanda and modern Sanda in China?

First of all, when it comes to potential movements, the traditional Sanshou focuses on defense. Now Sanda focuses on the middle of the leg, focusing on the integration of attack and defense. Traditional Sanshou also includes palm technique. Modern Sanda has gloves, but the palm is invisible. Sanshou also pays attention to the training of grasping, but grasping is basically not seen in modern Sanda. I read a book in the last century about Sanshou fighting. I found that I used to pay great attention to elbow technique, but I don't know why the elbow technique of Sanda has declined now. .....