If the Q400 does in fact violate delta scope. By being too heavy of a turboprop. I could see DALPA using this as a bargaining tool to get Embraers or CRJ-900s back to mainline.

The Q400 is such a comfortable and efficient airplane I wouldn't be surprised if this is what is holding back the orders right now.

How would everyone at the DCI's feel about a 1 for 1 swap, Q400 for their large RJs?