All the other martial arts, apart from "Cloud Dragon Divine Movement" and "Nine Demonic Divine Arts," were basically rendered obsolete.
With Ling Xiao's advancement to the Transcendent Realm, there was no longer any need for those martial arts.
Although it was with reluctance, as one must continuously strive for higher realms, some things had to be abandoned, some had to be let go—a necessity of progress.
...
The next morning, Ling Xiao retracted his Sword Soul Clone and then exited the cave dwelling.
"Senior Brother Ling, good morning!"
Jian Xing and Lin Feng were already waiting outside, treating him with utmost respect and regard, almost as if he was their leader or, quite simply, their boss.
They must have also heard about the tragic experiences of the Outer Disciples when training with the Inner Sect Disciples.
Whether they would lose face or not depended on Ling Xiao.