all that would be left for us would be dont forget from time to time when we visit vendor buy spare quiver, or loot our arrows back from the corpses (i can even imagine that there would be lets say 10% or 20% chance they broke).
That doesnt seem too tedious and it would bring both another immersion (after all keep check of your arrows is just as important in DnD as keep check of your spellslots) and tactical aspect ...
But why? Unless arrows cost a significant amount of money and/or weigh a significant amount, this will just lead to player behaviors of:
-buying 100+ arrows and never worrying about it again, or
-always clicking "repair" when they go to any merchant, which becomes a routine = needless tedium because it's negligible cost
In either case, why bother with this system?
And if buying/repairing arrows costs a significant amount, then the game has unfairly punished ranged characters. Unless you also want to add in a melee weapon durability system..??? (*vomits*)
I put keeping track of non-magical ammunition in a similar category as weapon sharpening/repairing armor after fights - yes it is technically more immersive, but it just isn't worth the hassle. I have played maybe one D&D campaign where we were told to keep track of normal ammunition, and we stopped after a few sessions because it was too tedious. The 5e system assumes that you always have enough arrows, unlike spellslots where casters are supposed to spend 10-30% of their total slots each fight.
