Quote Originally Posted by Kiero View Post
I think reality already does what we need here; try lugging a full bronze panoply around on an extended basis, and keeping it in decent condition. Furthermore, if you have proper rules for encumbrance and particularly heat fatigue, people will see the benefit of not cladding themselves in metal under the hot sun.
Endure elements + pearl of power = irrelevant

I'm sure other systems with magic have similar easy ways to deal with such things.

Environmental restrictions are some of the most easily subverted "obstacles" in a game.