It could potentially and probably fairly easily drag down game performance, or worse yet potentially affect server performance in online games. We're actually using 3D items that drop to the ground, but even Diablo II sprites cost something - performance wise. If items stay forever then it's essentially an infinite amount of storage, and if not and they disappear when you save and exit, how is that communicated to the player so they don't lose important items. In regards to it being possible in single player, again game performance comes into it. Allowing the player to substantially degrade game performance is never a good idea, they will do it, and in essence it's the game's fault for allowing them to. It's also a better approach to not change up unspoken rules in different areas of the game whenever possible. Making items disappear in multiplayer but not single player would be potentially be a very devastating piece of information not to have.
I don't think there could ever be enough space to keep some players from shuttling items to mules. It's going to happen. But making it a comfortable amount of storage, as well as having ways to easily and safely get items to and from characters are definitely goals to have.
Resumiendo, habla sobre si los objetos podran ser tirados en el piso y ser persistentes (como en d1). Aclara que por problema de performance los objetos desapareceran como en D2
Luego habla sobre el tamaño del staff y los personajes mulas