Thats exactly the point that several of us have made ( refering to otto's comment about pay )...........mainline mngt wont pay you guys 737 narrowbody rates to fly the 170 is substantially smaller....... the 190 Maybe is getting close.
I dont think any of us would want CAL to give up scope, otto is right, theoretically that might create more mainline jobs... but it might not.... mgt could just as easily let the gap in acft size remain... or have more 50 seat flying.... sorta like a mexican standoff in that case. I guess their theory on allowing 70 seat TP acft is that they cant/wont/dont have the legs that a jet could have with the same load..... couse with the new Q400's they are narrowing the speed and range gap considerably.......just some thoughts.