I'm 55 currently and I feel like I play this game for the first time. People are VERY active in world pvp especially in blackrock mountain and thorium point, it's like they never did that before. People are also hungry for loot, they will do these anger runs for hoj like mad. People are very kind and endure a lot of wipes and corpse runs which doesn't happen often in retail. The servers are extremely active for a retro game. Literally this feels like a new game and it's already one of the best games out there if not the best.
Is this a gaming phenomenon? I don't think something like this happened again in gaming. Release the same game with a delay of 15 years and still having the same success with it. Blizzard teach us that originality and new content means nothing, when something is great, it will always be great no matter how many times you repeat it. It's as they say a market fit product that cannot be surpassed even by the company itself.