Piglins should attack other humanoid mobs, such as zombies, husks, zombie villagers, drowned, skeletons, strays, illagers, and villagers. Just like with the player, however, they will not attack mobs who are wearing gold.
The Meaning of Life, the Universe, and Everything.
Almost none of these mobs exist in the nether, so this feature would only be effective for a few minutes after a piglin enters a portal. Then, they would become a zombified piglin and the feature would be useless.
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Remember those versions that minecraft pranked us with? Specifically:
Those are still downloadable! Watch this video for 2.0:
To download the other ones you need to make a folder in the versions folder for minecraft and put the client and JSON file for the versions in there. They all need to be named the same aside from file extensions. Once you do that, you will be able to choose that version when making a new profile with the minecraft launcher.