Also, since this catastrophe happened because of systemic bad engineering practices how many of the other upgraded systems or software in Boeing airplanes shoul

Also, since this catastrophe happened because of systemic bad engineering practices how many of the other upgraded systems or software in Boeing airplanes should we trust? Also of note, the US Air Force has been refusing delivery of the air tankers Boeing is building because of manufacturing sloppiness. Bad engineering and poor quality manufacturing seems to be a hallmark of Boeing these days.