I don't like the idea of equipment breakage, but thinking about it, stuff does break down, especially weapons and armor. D&D adventurers, in particular, are hard on their gear, often taking it into battle with unnatural creatures with great strength and natural defenses.
So this begs the question, if say, breaking on a natural 1 is unviable, when should gear break down? I recently watched a video on YouTube where a guy tested out the scene from Army of Darkness where Ash breaks a sword with a shotgun blast. It didn't snap off as it does in the movie, but the blade did bend and looked pretty sorry afterwards.
So thinking about that, and thinking about someone using Defensive Duelist to parry a Hill Giant's club, there certainly are times when gear should at least be temporarily impaired or damaged. Yet unless a creature has a specific special ability to break things, a DM ruling gear being damaged out of the blue might risk being lynched by their players! So a reasonable rule for extreme circumstances that a DM could point to might not be out of the pale.
I guess it comes down to whether or not the juice is worth the squeeze. The Complete Fighter's Handbook in 2e had a system where armor broke down after being attacked X amount of times, but when I tried using the rules, armor tended to be durable enough that it was never a problem in the field, and just taxed some gold out of the players they weren't using anyways (not to mention the same book had rules for masterwork armor, some of which was even more durable!), so I stopped bothering, much in the same way I stopped closely watching player rations- when I finally engineered a situation where they might run low, the Cleric just devoted a spell slot to feeding the group until they stuffed a Bag of Holding full of imperishable rations, rendering the whole thing moot.