It’s already been stated in canon that the power suit’s primary function is to protect Samus under any conditions. I think that this can explain certain things in the games, such as moments where the power suit lost upgrades. The example I like to use is in the beginning of Metroid Prime, where the impact against a wall from an explosion caused most of Samus’s basic arsenal to malfunction. The suit itself offers a heavy degree of protection, but it’s not invincible. In this case, the force of that impact might have caused cranial or spinal damage severe enough to halt Samus’s escape from the exploding frigate. threatening her life. The power suit deferred most of the force from the impact to a number of non-critical subsystems, using them as a sort of cushion. How? Well, we know that the power suit is easily capable of transforming energy to matter and vice versa. We can infer that many of the suit’s systems exist as energy and data, especially when not in use. Much like certain species of terrestrial life, the power suit can shed parts of itself to save the whole. In moments where the suit’s shielding is not enough to prevent a life-threatening injury, Samus’s Chozo power suit will essentially burn an upgrade, in the form of energy, to create a last-resort barrier against harm.
This behavior is seen again after metroid prime is defeated, and attempts to take Samus with it as it detonates. The power suit sheds the phazon suit upgrade in its physical form to release metroid prime’s grip on her, allowing her to escape. In Metroid Prime 2, Samus loses most of her basic upgrades to an Ing ambush. Here, we could say that the power suit expended these upgrades as energetic barriers that were consumed by the Ing before they could reach Samus and possess her. The Ing are capable of manipulating energy, and much of their forms exist as energy, so this checks out.
This general principle falls directly in line with our understanding of what the power suit is: a hyper-advanced cybernetic nervous system and modular exoskeleton. The nervous system plays the main role in threat response, so an artificial one would have its own methods for protecting its user.
