Just saw the MRJ flying around the other day here in the US...

There's only tens of billions of dollars at stake in all of this. My bet is something happens to allow them. Whether its clever engineering to get the weight down somehow, or pilot groups feeling like management offers them a deal the cannot refuse. Everybody has a price. I feel like managements haven't pushed as hard as they could have yet. A lot can happen in half a decade in this industry.