Lots of people I met on Nost are barely 18...
I don't think it's nostalgia that much. If this version of game was sucky, nostalgia wouldn't keep you this long.
Its just that vanilla wow is peak in mmo quality.
For example... try playing Everquest for nostalgia sake. You won't last 5 days there, good game but that's just it... good. Vanilla wow is awesome.
For me its the only REAL mmo out there. Why?
- It takes time to get something. I don't have intentions to no-life the game, I just like the feeling of the longevity which vanilla wow has. You can't simply faceroll it unlike 90% of other mmos out there.
- Like it or not, it looks just good for mmo standards. I don't care about flashy graphics and stuff, otherwise I'd be playing Tera or GW2. It runs smooth and won't hurt my hardware. Phasing and optimization of this game is top notch and there is no other mmo that comes even remotely close to it.
I know ALOT mmos that look even worse than WoW does and still run like 18 wheels truck

- Open world. Every mmo except ArcheAge has failed to deliver this. Why are you creating god damn huge worlds if you are going to put hotkey based queues into instanced areas?? After you reach lvl cap you will just stand in capital and queue for stuff. Sad. Just sad.
There is too much to write here and it's been written countless times before.
I'm not originally vanilla player, I started during late tbc days and the first real content I experienced was wotlk.
Difference between me (and people like me) and others who prefer wotlk+ content is just that we are taking the "term" fun on a bit different way.
I'll take real-life situation for example.
I have real-life buddies, best friends you can ever have. Always there for me and vice versa. Thing is, we can't get a game to play together outside some console arcade fighting game and ISS, FIFA etc etc...
They play MoP on wow freakz.. yes, you heard me right. And i'm here.
We are like black and white when it comes to WoW. They like to log in, press hotkey and get straight into action. Repeat it for 2-3h and logout.
I like to wander the world, farm stuff, attack alliance on sight, work for my gear and money income.
When I try to talk them into this they always defend their attitude by saying that "60wow" (as they call it) is a game for no-lifers.
They never felt a joy of getting first HARD EARNED rare item, not to mention epic item.
They never felt a joy of completing an instance after making 1h long run to it.
They never felt a joy of seeing more than 50 people outside of damn city.
Sometimes I feel sad for them, sometimes I just /shrug and say: "whatever floats you boat".
But I always blame blizzard for spoiling the community and leading the genre to its downfall.
Blizzard was company whose work is copied by many. Sadly "copy/pastes" of wow only took the genre to the level of complete misery.
The only mmos worth giving a shot outside of vanilla wow are Guild Wars 2 cuz of it's original progression approach (I don't like it tough) and ArcheAge if you got money for labor points.
Rest is pure crapy grind fest and char models with ass of my wife pasted on 10 year old looking females

Disgusting.