Minecraft wiki entry for Survival_with_no_enabled_data_packs, associated text: With the advent of Java Edition 1.13, data packs have been added to the game and can be enabled and disabled. Many of the vanilla game mechanics, such as advancements, mob drops, chest loot, the vanilla crafting system, smelting, and similar gameplay mechanics, are now stored in a default data pack called vanilla. Disabling the vanilla data pack, without adding any custom data packs, cause all that to disappear, which considerably adds to the difficulty of the game. It causes the conventional tech tree of wood to stone to more advanced technology is no longer operant, and searching through chests in generated structures is of no use, as the chests have nothing in them. Also, killing mobs are useless as well, as they no longer drop anything. As a result, even basic survival becomes a challenge in such a world, and very different approaches are required in order to make actual progress.