I haven’t played 5E on paper so I was actually wondering if that’s how the rules worked or not.
Technically no. In reality, yes. Bows require arrows and most spells require a material component. These are never tracked unless it’s something special. If a spell costs thousands of gold in material components to cast, it should be required that you actually aquire that component, but otherwise pretty much everyone just assumes that you are prepared with a enough basic materials. The same for arrows and any other basic resources usually. I’ve never played with a party that tracks food and water, for example. It’s just assumed you’ve come prepared.
I hardly have players even using arrows in our 3.5 games, but I do definitely require the expensive material components (like I know there’s a spell that requires a ruby with 100gp or more). Most of them can be acquired easily enough that it doesn’t matter (such as sulphur + bat guano) but if it’s expensive/rare enough, I’m going to make sure you can actually get them.
