Some players love & crave those niche aspects that, while not being perfect, make Aion stand out compared to the rest of the games in the MMORPG genre, above all the supremely superior combat gameplay (the best "classic TAB target type" combat in an MMO, even to this day), the faction open world PvP, and the community interactions happening on a daily basis, fueling excitement.
I am one of these players.
To us, Aion is an S Tier MMORPG that has been increasingly ruined by multiple factors throughout the last 9 years or so, and an official Classic server bringing together as many English speaking players as possible nowadays is as close as it gets to what we seek.