Endeavor is Delta's pax transport/hiring pool/training academy. They seem to be committed to spending the money to shore that up. Everyone knows the regional sector is coming to an end but Delta is investing in Endeavor until they have completely served their purpose. That's the business end of things. Delta even warned its pilots about the reliability of trying to commute on regionals. With that said I believe Endeavor will be one of it not the last regional standing.