I just did it counting arrows for a 5e dungeon campaign, and it makes things more interesting. 5E has turfed most of the original D&D dungeon crawl mechanics, but I can see why it was a thing - it adds a little bit of risk.
I count special arrows, but normal ones ? Its not fun if you build your built around it. Plus, its very easy to carry hundreds of them at once, using your party as mules. Meaning the only moments you are lacking bolts or arrows is either your choice or your DM’s. So, either you have fun yourself by adding a challenge, akind to me picking spells appropriate for my bard, or the DM’s that wants to limit you in a bad way
So far the DM isn’t being difficult. I feel like I should be able to carry a few dozen without penalty. We’ll see how the game progresses.
Indeed. You should. Which is why coubting them is as useless as nightime embushes that everyone still heals from at the end of the long rest.
