I posted about this previously here: https://forum-en.gw2archive.eu/forum/game/dungeons/TA-gear-account-bound-other-gear-soulbound/first#post3520156
But it appears that there is a huge inconsistency in dungeon armor, as in, Twilight Arbor armor is account-bound, even after putting runes in it, but no other dungeon armor is. Unless of course there’s an explanation for this…
But anyway, I think it’d be awesome if they were all account-bound like this. Would save a lot of time and pain.