Random find but I thought it was interesting:
You know when you think about it, the strategy for a lot of airlines is buy new and put the whole thing on autopilot and count your chickens. Delta's is hand fly it. Look for stuff like the MD-90s. The Wright Brothers bucked the trend in their time and went for a design that was inherently unstable like a bicycle is unstable so that they could control it, being unstable is not a bad thing.