Why don't many cars come with heated mirrors?

[VonJaxon]

Many cars don't come with heated mirrors because this feature is only frequently used during rainy days and is rarely needed otherwise, so it's not installed. Function of heated mirrors: Heated mirrors refer to the feature where, when driving in rain, snow, fog, or other adverse weather conditions, the mirrors can be heated via electric heating wires embedded behind the mirror surface to ensure clear visibility. How to use heated mirrors: In rainy or snowy weather, the driver simply needs to press the defrost button, and the mirrors will heat up (typically between 35 to 60 degrees Celsius), removing fog or frost buildup on the mirror surface. This not only provides convenience but also enhances driving safety.