The existence of formation arrays was primarily to achieve special purposes, one of which was to use weakness to triumph over strength.
However, setting up an array required time and lacked proactivity.
Take the Mountain Protection Array, for example, it needed to wait for someone to attack before it could show its effectiveness, and it couldn't pursue and kill enemies.
Another downside of formation arrays is the more powerful the array, the more cultivators are required to sustain it.
It is said that in the Immortal Realm, there is an ancient peculiar formation of immense power called the "Ten Thousand Immortals Formation," which can be formed by ten thousand Loose Immortals. By combining the power of ten thousand Loose Immortals, even a Great Accomplishment Immortal Emperor who enters the array would be reduced to ashes.
