If scope keeps deteriorating as it has over the last 10 - 15 yrs, I wouldn't be surprised to see DAL (and other legacies), within 20 years, flying nothing but international routes. ALL other flying will be done by the rj carriers.
Dont believe me, look how the rj's have grown over the last 15 yrs.........
Got to draw a line in the sand somewhere, and that somewhere is where we are now!
........................ thinking, or sweating, out loud....................