Im a forever DM. We play DND for fun not inventory management, anything tedious like that just isn't what I want to spend time in a game on.

Our rule was always that if you bought 50 of something like food or ammo, you don't have to track how many you've used, we'll just assume you're well stocked and resupplying offscreen. The limit only comes back if the party is overtly cut off from resupply, like if they are shipwrecked on an uninhabited island.

This means you can easily have a limitless supply of normal arrows but still have to track your silver arrows, smoke bomb arrows, etc. Or you can invest the money to just have a limitless supply of whatever specialty item you think is worth the cost.

food and ammo are things i never keep track of, unless its magical foods or ammo.

Except in Call of Cthulhu, because i feel runming out of ammo in that game is more interesting than in DND.

I like to use Usage Dice for this. Instead of tracking your arrows individually, you start with, say, a d12. At the end of a fight you roll it, on a 1 or a 2 the die downgrades a step to a d10, then a d8 etc. After d4 youre empty.

I wanna say I got this from the Black Hack?

Fwiw I run an old-school style game. 5e is more about power fantasy

Any kind of inventory management like arrows and food is way too sweaty and has never engaged a single player ever unless the whole point of the campaign is this exact mechanic. It's a waste of time and energy and I don't play with anyone that insists on doing it.

We play with the we don't track arrows and encumbrance unless you start trying to steal all the doors in the dungeon. The stealing of doors did happen with a group before I joined. We keep the rule just in case

My DM is kind and gave me "plot" arrows. It doesn't hurt that I turn the bodies of my fallen enemies into ammo whenever I can

I was doing this so thoroughly with one DM once, and - on account of my enthusiasm, I think - it took him two or three sessions before he told me he just doesn't give a shit if I count them.

We just buy 50 rations and a barrel of booze session 1 and it some how never runs out unless there's a crazy party. I think once we had some travel session that fast forward months of travel where he managed resources for a bit.

Arrow! Black arrow! I have saved you to the last. You have never failed me and always I have recovered you. I had you from my father and he from of old. If ever you came from the forges of the true King under the Mountain, go now and speed well"

DM: "Okay, fine. But after this you can't use it again."

There are some formats where inventory management becomes interesting again. We tried doing a Hexcrawl earlier this year and there was a lot of interesting gameplay to be had in the risk/reward management of how many supplies they wanted to carry vs how much they wanted to invest in pack animals, limiting their ability to carry loot back, carrying this vs that, guessing how much they'll use before they can resupply or where future resupplies might be, gambling on whether to press forward and risk running out or turn back, that kind of thing. It's just the more currently popular adventure structures right now (eg linear or branching narratives) where inventory tracking is superfluous.

I have an invisible mage hand that can pick the keys out of the jailers pocket. If you want me to roll for collecting every arrow… I will

One dice at a time

My DM never gave a shit or required me to buy arrows. I tracked them sometimes anyway, but we always just shrugged and said I either fletched my own during downtime, or that arrows were included in general party upkeep/funds.

Bows are OP until you have limited arrows