For example, +1 Leather Armor has the same total AC as nonmagical Studded Leather Armor, and +1 Splint Armor has the same AC as nonmagical Plate Armor.
Unlike with magic weapons that overcome resistances on dozens of monsters, there doesn't seem to be much point to having armor be magical "just for the sake of it". I can only think of three specific benefits:
- Armor with lower base AC tends to be lighter (+1 Leather is 10 lb., compared to Studded Leather's 13 lb.)
- Oozes (Black Pudding and Gray Ooze are the only ones I can find) and Rust Monsters can damage nonmagical armor, but not magical armor.
- According to the DMG, "Most" magic items have resistance to damage. There don't seem to be many rules for how many hit points armor has, but this rule can at least help.
I feel like there has to be more of a point than just these. Are there any other types of monsters or spells that are less effective against magical armor?
Actually, thinking about it, this might also extend to "what's the benefit of +2 Leather compared to +1 Studded Leather." Or it might not, I don't know.