Some martial arts are extremely demanding to learn. For example, the Ming Cult's Keen Kwun Dai Loi Yee was so difficult that until Cheung Mo Gei came along, nobody was ever able to approach its seventh and final level. Each level took many years to learn, and even a gifted martial artist such as Yeung Ding Teen never got past Level 4. Another Ming Cult Leader got to Level 5, but at the cost of a fatal fire deviation.
Cheung Mo Gei was able to successfully reach Level 7 because of his 9 Yeung Jen Ging mastery. What took others years (and often fail) to learn he mastered in minutes because of the 9 Yeung Jen Ging boost.
Another martial art that is notoriously difficult to learn is the Lung Jeung Bor Yeh Gung practiced by the Golden Wheel Monk in ROCH. As great as the Golden Wheel Monk was (on par with China's Five Greats), at the time of his death, he was not close to the theoretical thirteenth and final level of the Lung Jeung Bor Yeh Gung. The time requirement for each level was such that nobody could live long enough to reach the hypothetical thirteenth level, although anyone who could would supposedly become a superman.
But what if somebody started training in the Lung Jeung Bor Yeh Gung with not only the same level of 9 Yeung Jen Ging mastery that Cheung Mo Gei achieved in HSDS, but also Hui Juk's Siu Yiu Sect inner power from DGSD *and* the snake organs that the Divine Condor supplied to Yeung Gor? With that combination, would it be possible to reach Level 13 of the Lung Jeung Bor Yeh Gung in a reasonable amount of time? Or would the person be so powerful already that Lung Jeung Bor Yeh Gung Level 13 would actually be redundant?