Keep Inventory... But its hardcore? gives Keep Inventory a real death penalty.
When you die with Keep Inventory enabled:
Tools and armor are kept — swords, pickaxes, axes, hoes, shovels, helmets, chestplates, leggings, and boots.
Everything else is removed from your inventory.
You don't need to own every type of tool or armor — the addon protects whatever matching items you actually have.
Items such as diamonds, blocks, food, ores, ingots, and other resources are lost.
With Keep Inventory disabled, Minecraft's normal death behavior remains unchanged.
Keep your gear. Lose everything else.

