Delta wants to be the launch order to the 797 - if Boeing can get its act together. Can’t imagine the incremental benefit a 737-8/9/10 MAX could offer over the A321 NEO would be so huuuuuge. The MAX, like all 737s, is uncomfortable for both pax and pilots relative to the Airbus. Just ask any SWA pilot how his back/azzz feels after 5 years of flying the 737 NG/MAX. It ain’t good.