I like ammunition and durability, but only if it affects the gameplay considerably. In Fallout 4 for example I always played with harsh loot overhauls and durability mods (f.e. armor breaks if hit) and without fast travel, and you had to access the world in quite a different way than in vanilla. I cannot however see the impact of ammo and durability in BG3. Would the world approach and the fights look differently with it? Hardly so, for the reasons already mentioned in the thread. A harsh rest and weight carrying mechanic, and a very restricted travel system had to be introduced, for which the world is not made in my opinion.
I hope (I fear in vain however) for visual quivers but actual ammo I don't need. A kind of item durability could perhaps be simulated for magical gadgets (which for my taste are around in a terrible overabundance) if they would lose magical charge over time which had to be restored. But is it worth it? I doubt it.
There were easier changes to make the world a bit more demanding in the given frame (f.e. make shove an action, restrict stealth more to Rogues, diminish availability of scrolls and potions, introduce crossbow loading, make weapon set change cost something, remove shield AC when ranged weapons are out).
(PS: And of course the most important change I'd wish: remove torso hair from the half elves!
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