Originally Posted by
EdenResident
Here's my theory why YG abandoned the HIS.
What makes a great fighter? Wuxia physics or real life, the basic ingredients are the same: strength/power, speed, agility, reflex, muscle memory, some strategy. One thing is also as important as those things: sense of balance. A great fighter needs to maintain his balance at all time. When off-balance, he can't strike effectively and will be exposed for the opponent's attack. There are many martial arts disciplines whose primary attack is to throw your opponent off-balance: Jujitsu, wrestling, etc.
When YG yields the super heavy HIS with his lone arm, his center of gravity shifts to 1/3 of his body. This means that he's inherently always off-balance. He can still beat stupid fighters like QQR but sooner or later, other Great-caliber fighters are gonna figure this out.
YG is smart and he realizes this. So after Passionless Valley, he goes into hiding to figure out how to fix this. Of course, the HIS absolutely has to go. He's faced with 2 choices:
1. Progress to wooden sword stage
2. Get rid of the sword altogether and go back to palm attacks
YG picks option 2, probably because he's more comfortable with this path. Being a genius, YG realizes the disadvantage of his non-arm. Therefore, he tries to incorporate as many body parts in his attack as possible, something different from "traditional" wuxia arts, which primarily use hands/palms. Thus, Sad Palms are created. And thus, we never see YG with the HIS anymore. The HIS would be a huge hindrance to his martial arts progress and YG is very smart to get rid of it.