FormerlyHemlock
Hero
The trouble with the AD&D rules is that their application wasn't described. So, while some groups used that rule, it's quite likely not the intention of the rule. Does your armour have a 1 in 20 chance of breaking with every normal hit? Erm...
The AD&D rules often assume people are still familiar with the D&D rules. In the original form of the rule (Monsters and Treasure, page 38), an item would make a saving throw only if the item was unattended or the wearer was killed. In AD&D 2E, the rule was changed to items having to make saves if the wearer failed his or her saving throw.
That's great! It means the 5E variant rule I just proposed is not only idiomatic to 5E but also resembles the original Monsters and Treasure rule!
I know that I for one am willing to hand out more treasure if I know that their treasure occasionally gets destroyed or lost. It also makes artifacts more special.