Generally speaking, what are the disadvantages of metal bracket correction?

Metal bracket appliance is considered as the mainstream appliance in orthodontics, and its biggest disadvantage is that it is not beautiful, but if my gas field is big enough, wearing metal bracket will also feel like sticking to diamonds; Another disadvantage is that we need to brush our teeth more carefully than the invisible appliance, that is, the bracket-free invisible appliance. When we brush our teeth, we need to brush the steel wire around the metal appliance, between two teeth, especially the neck near the gums. If the toothbrush is not clean, the gums may proliferate and shrink. In a word, all kinds of appliances have their own characteristics, and patients need to choose the right appliance for treatment according to their own conditions.