I think that both types are taking jobs from mainline operations and allowing the mainline to shrink. Previous "RJ" types, the BAe146, F28, and Bac 111 were all flown by mainline. Darned shame regional airline pilots are willing to work for less pay and benefits in order to fly the almighty jet....no...strike that. I cant blame the pilots. Darned shame that ALPA is not able (or willing?) to create an industry wide campaign against the use of RJ's to take mainline flying. Someone must be lining their pockets.