Most importantly, they did not have any extraordinary legacies or corresponding extraordinary knowledge and systems. By studying craters, they figured out how to use Divine weapons to absorb the power of heaven and earth. That way, they could transcend.
However, their utilization of this extraordinary power was too slow. Without a legacy, they could only rely on the gathered experiences of numerous people.
They inevitably made mistakes, and countless people with lofty aspirations went berserk or even died because of this.
Therefore, although the supernatural powers of this world had been developed for decades, there was still an insurmountable gap between it and technology.
After all, extraordinary power was invisible and intangible. There was no relic or reference point. It could only be created out of thin air, and that was obviously challenging.