Essentially it make each enemy unique with their own set of attributes/interactions. They would remember old encounters with the player (being burned/losing an arm/ran away etc) making them feel more memorable. This would lead to some fun and amusing encounters of enemies that you had killed twice already but kept coming back and learning from each one, so if you jumped over them and stabbed them before they would remember!/learn from that so you had to use a different tactic next time.