That blue is incorrect.
All realms ARE NOT connected. The Mankrik cluster (pve) is not connected to Whitemane cluster (pvp). You cannot group in the world with players from those two clusters. Those 2 clusters don’t even share the same auction house. All realms are only linked for the purpose of battlegrounds.
Blizzard’s logic for removing transfers is based on a fallacy and now my other 60 is stuck on the wrong cluster. And by the looks of that thread, I’m not the only one who has been left high and dry with no warning.