What is the reason for the start-up capacitor burning out?

What is the reason for the start-up capacitor burning out? Single-phase motors with a slightly higher power are generally equipped with two capacitors, namely start-up capacitor and running capacitors. In 70 years ago, single-phase motors mostly had a capacitor as the starting capacitor. After the motor is started, the capacitor is thrown away by the centrifugal [...]