IIRC part of the problem with the Max was that since it was based on the 737 it bypassed a lot of processes that a brand new design would've had to go through.

IIRC part of the problem with the Max was that since it was based on the 737 it bypassed a lot of processes that a brand new design would've had to go through. Both on the regulatory and pilot training side (eg a pilot who was already qualified on other 737 variants would get a fast tracked and probably inadequate training)