Can the FPC flexible PCB replace the PCB hard board?

FPC flexible circuit board, also known as "soft plate", is made of flexible insulating material such as polyimide or polyester film. It has flexibility. Short, small, light and thin are its characteristics. FPC flexible circuit boards also have one side, two side and multi-layer boards. Because the production of soft plate is low and the cost and price is high, many production enterprises can not be used as the main board directly. At present, it is mainly used in the electronic terminal products and the hard board. What is the advantage of this?