Will This Eventually Be Permanent?
I doubt it would be a permanent addition. if anything; it makes sense to only have this as some temporary content that comes back around every couple months. If it was here every day you wouldn’t be as inclined to play it as often as say when it’s only for a month.
SAB is a permanent part of the game that is temporarily accessible.
SAB is a permanent part of the game that is temporarily accessible.
This is probably the most accurate answer for now… though in long term I doubt ANet has finalized their plans regarding SAB after all four worlds are done.
Judging from posts in April they had to do some engine changes just for SAB, so it is unlikely that SAB will be removed after the four currently planned worlds. But will they keep rotating the existing worlds with different rewards in and out, add more worlds, or make “SAB 2” in-game is anyone’s guess.