Java Edition:Pre-Villager Trade Rebalance Villager
In 1.21[test], trading will be changed to biome-based trades instead of more randomized trades, making certain trades, such as a non-swamp/jungle villager selling chainmail armor. Some changes were also made to wandering traders. This means that some villagers and wandering traders[test] will become discontinued once the rebalancing is fully implemented. As of right now, this is a future discontinued feature, as the changes haven't been fully implemented yet
Mechanics
The mechanics of these villagers is quite simple and known. For librarians, they have randomized enchanted book trades instead of having them biome based like with Villager Trade Rebalancing. Armorers could also sell diamond armor without diamonds.
Possible Trades
(Please update the following information)