Why don't you get rid of PCB hard PCB?
Manufacturing factors: the rigidity of the plate is higher than the flexible plate
Cost factors: the cost of flexible plate is still much higher than the rigid plate, more than doubled.
Design factors: the need for the use of plug-in components of the PCB, can only use the rigid plate, what you say and there are a lot of stress; the PCB, can only use the rigid plate
