In the days of fibre optics and modern cheap cameras it is hardly going to break the bank ?
Lockheed went out of business because they made their aircraft too well in some cases. The L-1011 Tristar had a ladder that went from the cockpit in the event of an emergency. Boeing provided a rope to slide down.
There are sharp edges in the hold of a Boeing because they reckon it costs man hours to finish them off.
Boeing stuck shims between the frames and the skin on the early B707's.
Everything Boeing does is man-hour cost related. A downturn in sales then Boeing lays people off.
Airbus try to redeploy their staff 'in-house' so there is continued worker skills. The Airbus build quality is superb.
Nothing wrong with Boeing they just use a different manufacturing philosophy with regard to staff costs.
saw the camras on swiss air which they pipped them onto the screens in the cabin if I remeber right it was the latest varient of the dc10
there was a uk caa recomendation of cameras being fitted after the bmi crash in birmingham 10years + ago where it turned out the throttle controls where cross wired so when they tried to turn of the engine that was on fire the ey turned of the good engine