@DM_Zeppelin@Jackgiantkiller "You can't use gunpowder in a world where wizards can cast fireball! One fireball will wipe out a whole platoon of musketeers!"
Yeah. You don't have to worry about that with archers, because they're flame retardant.
Over the past 50 years of D&D, players have been happily carrying flasks of oil specifically to light stuff on fire. But you pick up one powder horn and suddenly you're a walking bomb with a target on your back for anyone with a torch.