The A380 has a unique way of reducing the odds of a triple hyd loss-- there is only 2 engine driven hydraulic systems with the backup provided by electro-hydrostatic actuators and electrical backup hydraulic actuators. The latter 2 backup sytems have their own electrical motors and independant hydraulic fluid source which is refilled on the ground via the Green and Yellow systems. Seems like full proof when you consider that the systems are independant of each other. The primary reason for such a design is to save weight.
