For the people who can't understand why people want to go back and play the original version of WoW I ask you this, why do people continue to flock to classic sports cars?
Yes the new sports cars are awesome but with all the new tech the cars hold your hand a lot of the way. They've streamlined lots of stuff like making cars automatic or having driving assists.
Now we go back to the classic sports cars for that real feeling of driving. No driver assists, no abs, no traction control or power steering. You have a clutch and shifter. You have to work extra hard to get the most out of the car but it rewards you heavily. It doesn't hold your hand in any way.
Retail WoW is the new super cars with all the fancy tech that holds your hand.
Vanilla WoW is the classic sports car where you really have to pay attention and learn the how the car drives. The more you practice the more you get out of it and since it doesn't hold your hand or make driving easy it's much more satisfying and rewarding.
Hitting that 90 degree turn without the rear end sliding out will feel much better in a car that isn't doing majority of the work for you.
At the end of the day the classic sports car will always be more thrilling, exciting and rewarding when compared to the new sports cars with all the driver assists.