I cant speak about older editions but was interested with the idea of some armors being better or being less effective against certain weapons. Something to differientate armor and weapons more. I feels advanced martial combat rules is missing from 5e. They spent how many pages on spells....sorry of topic...
I used to play an unlicensed supplement to the original 1st edition D&D made by a bunch of CalTech nerds in the late 70s called Warlock (hence my screen name) that did this on a D100 system. To be honest, it doesn’t really add that much to the game. You carry an extra weapon or two, big deal.
