Attribute increases are not simply linear increases, but rather stepwise growths.
For instance, when a Martial Apprentice is on the verge of Foundation Establishment to become a Formal Martial Artist, the "Essence" attribute can generally reach 5 points.
This is also a rigid requirement for Foundation Establishment, as, at least physically, one must be able to withstand the consumption and pressure brought about by Foundation Establishment.
On this basis, for each additional point, physical strength can be increased by at least a quarter!
Although the magnitude of physical enhancement diminishes as the points increase, focusing on the three primary Attributes remains the most effective way to strengthen oneself.
This is precisely why Chu Feng, when able to allocate points, chose to first augment the "Vitality, Energy, and Spirit" Attributes—
He was the greatest beneficiary of attribute enhancement.