Actually, they did because SWA was the launch customer for 737NG (700, 800, 900 series). Therefore , what you meant was Boeing wasn't going to design another A/C for the rest of us because SWA wanted the exact same panel as the -200, 300, 500 series. Also, we couldn't have had the much quieter (and roomier cockpit) of the 757 because of the common type. Boeing had both of those modifications laid out in the design phase that were never implemented. You know, DAL (and others) manage to fly a common type for 757/767 with different FMS packages and SWA couldn't figure out a way to common type the 737 variants. It's also amazing to see press releases touting SWA's revolutionary use of RNP departures and approaches (that have been available on the 737-700 at launch). I JS on you guys a lot, appreciate it a lot, BUT it is painful to watch you struggle with 737-700 displays that were designed just for you. Also, the complete prohibition of many of the automation features of the 737 NG (autobrakes, RNP departures and arrivals, no autothrottle, etc) was painful to watch.