Originally Posted by
ninerdriver
I guess I should have said, "Delta would want each of its regionals to fly both CRJs and ERJs." YX would have CRJs to keep OO and 9E on their toes. 9E would have ERJs to keep OO and YX on their toes. Theoretically, it'd be easier to swap Delta-owned planes among regionals if they all flew both RJs, just in case one of those regionals failed/disapparated/was Comaired.
Even so, it would make zero business sense to implement the training and logistics support program until the regional actually had the contract signed and the second aircraft physically inbound. Keeping slots filled for equipment you actually DO have - both ops and maintenance - requires enough effort without building capabilities for things you don't even have a contract for.