Indeed!
Even though he had a premonition, when he saw the Will Dao Disc shoot up to 99%, Xu Xiaoshou was still taken aback.
You should know, after surpassing Taoization, which is after 90%, whether in the Divine Relics or in the All Time Forgotten Sorrow Pavilion, Xu Xiaoshou could feel that bottleneck.
In short, even with Passive Points, it was very difficult to ascend further.
If one recklessly pushes forward based solely on a whim, it's bound to result in major problems. At best, one experiences cultivation deviation; at worst, it could lead to Taoization or even getting lost entirely.
Yet in the world beyond the third door, under the "care" of Nuozu, there was no such constraint.
Without using Passive Points to recklessly push the Great Dao Disc, by enlightenment through self, he pushed the Will Dao Disc from 90% to 99% for the first time, and the improvement was astonishing.