Ditto ^ t, I've been using it since the very start during my second playthrough, which is more of a speedrun test. When playing a squishy person, it's nice to use someone else as a pack mule, especially so I don't have to go back to camp just to retrieve stuff I want to sell. I haven't had the chance to try playing multiplayer, so I imagine inventory works the same as it does in Larian's other games. Personally, I would then want to see characters have more autonomy in the game if I couldn't access their inventory.