Ammunition is great (and required) for special ammo; however, I don't see the point for common ammo. Arrows are cheap and light enough that I can buy/find/hold way more than I'll ever need -> why should I need to bother with the UI?
Durability is mainly just tedious unless the game mechanics support it. As you can rest and fast-travel from wherever in BG3, a durability system wouldn't make anything about the game more interesting. At worst, it'd just mean you felt obligated to rest/travel to the blacksmith more often.
The only way I'd accept durability is if there was a way to significantly damage equipment in combat (e.g, Sunder actions), but this would mean adding relevant actions, item HP & hardness, etc into BG3. And at the very least, Larian needs to implement all the base 5e mechanics before I'd want them to tackle that. Plus, this might just work better if it only lasted for that combat: e.g., "On a successful Sunder, target has -2 to AC for the next X rounds."
