It really depends on many variables, and I'm not being "optimistic". CAL is one of those outfits as many of us know that loves to retain market share even during down times, and even if it means running an RJ half empty (instead of 737) as was the case post 9/11. Again, it depends on multiple factors, fuel cost, route structure, market share, and honestly I don't think any of us can predict when a type will go away, we could have more jets flying here in year or we could have less. As Nevets just said, there will always be a market for the 50 seat aircraft, it all just depends.