"Challenge is part of it," Birmingham continued. "The world feels dangerous. There are difficult group quests out in the world, elite quests that you can't do by yourself, or you would have to over-level if you wanted to do them by yourself. Where they really push you to find somebody else to help you out, or out level them and come back later, or you can just leave them and go on. You don't have to complete every quest in every zone. You can choose your path through the world. So I think that is exactly the classic gameplay that people are looking for."
Most people who have spent years playing massively multiplayer online games will tell you that there's something special about the first one you played, too—and WoW was the first for many people. You can become so swept up in the uniqueness of your first experience that you overlook many flaws. It's likely many look at WoW Classic with rose-colored glasses, just as many simply forgot which features were added when. And some of today's WoW players may be too young to have even played vanilla WoW as it once was.