Classic has essentially been "solved." The main barrier back in 2004 was not difficulty, but knowledge, organization, and tooling. Modern "retail" WoW is orders

Classic has essentially been "solved." The main barrier back in 2004 was not difficulty, but knowledge, organization, and tooling. Modern "retail" WoW is orders-of-magnitude more difficult to offset those improvements. Guilds have enough resources and player skill to greatly limit the possiblity of unexpected chaos.