Why is negative feedback preferred over positive feedback in control systems?

Negative feedback subtracts the feedback signal from the reference, driving error toward zero. This creates a self-correcting system that maintains stability and tracks the reference. Positive feedback adds the feedback signal, amplifying any deviation from the desired value, leading to instability or saturation. Negative feedback reduces gain but improves linearity, stability, and bandwidth. Positive feedback is used intentionally only in oscillators and comparators with hysteresis.