FrogReaver
The most respectful and polite poster ever
DMs need to keep the ammo rule in mind because it imposes a couple of constraints that are worth having now that WotC have thrown away so many. One is that the CE/SS Hand Crossbow wielder can't fire four times then change weapon or switch to shield, because they lack a free interaction to do it with. They can't haul out a potion of healing and quaff it. If they are falling back, they can't open any doors. I will admit this is all kind of clutching at straws, but then... it is in the existing rules so why not use it?
Umm, it doesn't require an object interaction to draw arrows from your quiver. You do that for free as part of your action?