I want to add a few more comments...

The late '80s until the introduction of the 737-400 in '92ish was when the entire industry was experiencing its last hoora with full service. The cost of this was so great that it overshadowed expenses related to the 'smoothness' or lack thereof from operating a multi-aircraft operation. Alaska's pricing power was strong along with large essential service subsidizes in said State that the company could afford to waste on service and be profitable. Every flight had a hot meal that ran about $10 per passenger. In addition, wine in coach was complimentary and each flight had 20 Chardonnay's and 20 Cabs to ensure flights never ran out. Stewardesses er Flight Attendants just poured from the bottle. Hard to imagine we made money at all. But we operated in high yield markets and barriers to entry in various Mexico destination until that was deregulated in '95 by NAFTA, but that's another topic.