I said it somewhere else, but I kinda want to say it again here. I need to put a disclaimer first: I haven't really played Breath of the Wild, so my opinion doesn't go further from what I've seen in review videos or what I can infer from the thing.
The biggest "issue" that could happen from how the weapon durability thing works in Breath of the Wild is the fact that weapons lose identity. You don't grab weapons out of their stats or usefulness; you grab weapons for a quantity reason, to have a huge arsenal and keep swapping around when things start breaking over and over and over within the same (or close) combats. Find a new, unique weapon? Either keep it as some sort of trophy you won't ever use it because it'll break down in 30 hits or have it as yet another part of the arsenal you're going to use in the same place. The former makes you deny the weapon its usefulness out of fear of breaking, the later just makes it part of that quantity-based combat, and thus, doesn't matter how cool the weapon because you'll use it for/as replacement of a weapon that already broke.
