Well... ALPA will tell you don't worry about it. But they have no backing to that statement. I flew with a few local union guys that said it's actually a HUGE concern. Alaska management has told ALPA they will follow industry standard on who flies what airplanes. But I would bet money if a E190 or C series/Mitsubishi showed up that Horizon and Skywest would be bidding on that flying. 2 other concerns.... Without question, the E175s will completely replace most of the State of Alaska 737 flying. I don't think the ANC base will go away because there are plenty of nonstops to far away places and perhaps a long-term market if oil prices come up for some north slope flying in -800s. But besides that I think you will not see 737s in any State of Alaska station besides ANC, FAI, and JNU - perhaps even seasonally with JNU, just a nonstop to SEA. 2nd concern, with NO scope at all, there are issues besides just bigger jets. The big 3 legacies (and Hawaiian actually has great scope) have limits on how many airplanes can be operated in their regionals based on various metrics like mainline vs regional seats. Alaska has nothing like that, so to me the job security is very poor. AND all of this is not even considering the merger. That adds a whole new list of concerns.