But a common theme of this thread has blamed the MAX problems on a 1967 cert basis. Which is quite simply wrong. Cert basis had nothing to do with it.
Can you expand on your position on that a little? This whole saga came about because of grandfathering certificates and the inability to change anything substantial. The issue of MCAS can be aerodynamically solved if there were no certificate restrictions in the first instance. MCAS was installed because they weren't allowed to aerodynamically change the aircraft, as far as I understand it.