My understanding was that Boeing were originally planning to do a clean redesign of the 737 (similar to the 787), but due to customers going with the A320neo, t

My understanding was that Boeing were originally planning to do a clean redesign of the 737 (similar to the 787), but due to customers going with the A320neo, they rushed out the 737 MAX instead. So that last point about 737-700/800/900 may not be valid.