DC motors are especially widely used in transport (trams, trolleybuses, electric locomotives), in industry (for pumping oil from a well) in everyday life (in electric shavers). Electric motors are smaller than thermal motors, as well as much higher efficiency, in addition, they do not emit gases, smoke and steam, i.e. more environmentally friendly.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.