I ditched AA back in June 2017 for a plethora or reasons and one was tired of flying in crappy old MD-80's every time I went from DFW-IAD. I have had one problem since then in over 50 flights with SW and it was handled so well I could not complain. DCA-DAL flight diverted to BWI 45 min in due to mechanical problem. Like was said before I don't believe the mechanics will do anything to risk the passengers because all it would take is something stupid like that to put the company, and their jobs/pensions, at risk. I have to book several flights to DC (once my fraud compromised corporate travel card is replaced) and I will continue to book SW and not look back. I know there are ongoing issues but honestly I am just not going to worry about it.