They seem to be actually living
Red Dead Redemption 2 managed to bring new innovations to the open world genre and every developer team should learn lessons from it. Rockstar Games has once again proved that it is a company that gives very much importance to the details of Wild West themed open world. Youtube channel DefendTheHouse's Red Dead Redemption 2 video, proves that the living world of the game really "lives". Non-player characters do their daily routine, then go to the town's bar at night, drink, then return home. You can watch what NPCs do in a day from the following player.
Non-player characters are an indispensable part of open world games. The non-player characters often wander around the open world to make the player feel that they are living. In many games, they seem to be dealing with routine work. In Red Dead Redemption 2, non-player characters actually practice their professions, give a break, and then leave work to drink something in a tavern. We can say that such details enrich the world of games.