Why don't they use fuses anymore?

Fuses have largely been replaced by circuit breakers in modern electrical systems due to their convenience and safety features. Unlike fuses, which need to be replaced once blown, circuit breakers can be reset after tripping, making them easier to use and maintain. Additionally, circuit breakers provide better protection against overloads and short circuits, and they can be designed to trip at specific thresholds for added safety. This shift has led to a more reliable and user-friendly electrical system.