[pfflier]

Look at the history of the 737. A very good and reliable plane since 1968 yet still has nagging design questions about the rudder actuator.

Such is the nature of airplanes. The cost of leading edge technology is constant change and improvement either to make the system better or to deal with surprises the designers didn't foresee.

[driftdiver]

The 737 does its main job exceedingly well.

This aircraft doesn’t do anything well.

[SunkenCiv]

Exactly.