Allow unlinked objects to be moved together, such as the legs of an animal that would need to do a rotation / animation independant of the body but still move with the body. This would be as a method llBindObjects(list objects) or a permanent association during modelling and need a complementary method like llSetBoundPos(vector pos) & llSetBoundRot(roation rot) as setpos & setrot would now only operate on the current object/link.
It's almost impossible to implement realistic pets without something such as this or suffering lot of lag
