It doesn't necessarily mean to turn WoW in a simgle player game. Just being able to setup servers in a reasonable way (i.e. not reverse engineering and emulatin

It doesn't necessarily mean to turn WoW in a simgle player game. Just being able to setup servers in a reasonable way (i.e. not reverse engineering and emulating how they work, like people have done for WoW). Look into World in Conflict, its a great example of what to do: https://github.com/ubisoft/massgate https://github.com/ubisoft/massgate