Brack says that, as much as Blizzard has known about the wants of their group, as of not long ago they just couldn't see an approach to get it going. "The first issue was that we would need to run two MMOs," he says. "We would need to run Classic WoW, and after that present WoW [at the same time]. Exemplary WoW and current WoW truly don't work a similar way any more. Exemplary WoW has a wide range of bugs and issues, it has a wide range of adventures and hacks that everybody thinks about. Furthermore, in current WoW, we'd made a fantastic showing with regards to of decreasing those issues, and we didn't perceive how we could run two MMOs like this."

The issue is one that goes considerably more profound than the surface, down to the extremely base-level programming and equipment that Vanilla World of Warcraft utilized as a part of 2003. To run Classic servers, Blizzard would need to assemble a completely isolate server and customer engineering diverse to the present form World of Warcraft utilizes today. It would mean running two partitioned, expansive MMOs in the meantime—a monstrous specialized test. Their new arrangement is as yet difficult, yet Brack says the group has made a leap forward.