Lets face it, the game has been out for 8ish years. One does not simply keep playing because there are not better games out there now, there are more underlying reasons.
Do you play WoW because you are addicted to it? For example, you cant get yourself to get away from it because you believe you invested already too much time into it to even consider seriously playing another game?
I think a vast majority of people don't give other games a chance precisely because they are addicted, and therefore treat all other games as "second class" to their one and only god that is WoW (that they just cant get away from).
Is there another reason entirely that you play WoW?