Personally looking at all of this conversation, I would like to highlight this:
Taen
Use Kafra bell, arrange your storage.
We have multiples storages and Kafra Cards are virtually free and infinite, so arrange your storages, fill them with arrows/bullets, if u want do some quivers and put them there.
I'm not a quiver user, I rather just use the arrows/bullets separately and I can't think a situation when you use an entire stack of ammunition (30.000 pcs) and I'm talking on a Night Watch perspective too, where i ended used 15000~20000 bullets in a hour. Vigilante ftw
Additionaly, the "new" element table changed on how ammo should be managed, I'm talking about when using the wrong arrow/bullet it was really punishing, so nowadays you basically go with at maximum 2 elements at least, and no 4 up to 5 for different elements, also the change on being on overweight changed from 50% to 70% and that really helped low STR jobs. (if u care about hp/sp regen% but i think it's more imporant about the overweight limit 90%).
Lastly, there's @restock to be more efficient on managing time from ammo restocking.
-1 for infinite quivers.
Quivers/Ammoboxes already have half of the weight of a stack on arrows, but if reducing their weight could really help a quiver user or anybody, then +1 for it.