Just before the end of 2017, Boeing and Embraer made sure the aircraft industry had lots to think about during the holiday break as it prepared for what already would be an important year. The two companies confirmed they were in talks about some form of combination, the details of which remained to be confirmed. Since then, not much further information has surfaced. But it would be wrong to assume a deal that would align the No. 1 and No. 3 producers of commercial aircraft is off. It is ...