Boxing & unboxing is the process of converting a primitive value into an object oriented wrapper class (boxing), or converting a value from an object oriented wrapper class back to the primitive value (unboxing).
The Old Dalaran will stay in Northrend, so yes, mages are going to have 2 portals to dalaran (one to Northrend and one to the Broken Isles)
World of Warcraft's Old And New Dalaran, Compared. The fan favorite neutral flying city Dalaran, first introduced in Wrath, is returning in Legion as the expansionâs number one hangout place. And four expansion later, itâs a completely renewed hub. The folks over at Trade chat made a neat side-by-side comparison video using footage from the Legionâs alpha build.