Permanent Content
We have permanent contents besides the core game, let me list them.
Oct 2012 release: Mad King → Oct 2013 Mad King + Bloody Prince
Nov 2012 release: Lost Shore → Southsun Cove is permanent
Dec 2012 release: Wintersday → Dec 2013 Wintersday
Jan – Apr 2013 releases: Flame and Frost → Nov 2013 Flame and Frost both Dungeons and Boss are now permanent, as fractals dungeons and bosses
May – Jun 2013: Secret of Southsun → May 2013 Southsun crabtoss is permanent on rotation
June 2013: Dragon Bash → Will come back next year as Dragon festivals is tradition
July 2013: Sky Pirates → Nov 2013 Aetherblade retreats is now a permanent dungeon, in fractal
July 2013: Bazaar → Mentioned the ship, it will come back
July – Aug 2013 → Not sure
Aug 2013 – Clockwork Chaos → Still around, scarlet invasion everday
Sep 2013 – SAB → On rotation
Sep 2013 Tequatl rising → Permanent
Oct – Nov 2013 Twilight Assault → Still around (dungeon will probably be permanent through fractal)
As you can see most if not all temporary contents are permanent. I don’t see a problem. You weren’t there when it happened, you missed the “achievement” – some yellow bar filling up, but don’t go around and say the contents are not permanent because they are.
Oct – Nov 2013 Twilight Assault -> Still around (dungeon will probably be permanent through fractal)
Actually, TA Aetherpath is a permanent replacement for old TA F/U path. I doubt it will ever be dragged into fractals. But, if you meant to refer to the Toxic Hybrid instance (top of Tower) as well then idk about that, it may disappear if/when Tower does but who knows…