I think you underestimate how complex 1950s tech can be...
Fault finding on this bad boy...rather you than me.
View attachment 446140
There will be literally hundreds of miles of wires behind that..all 50 years old, and transistors and valves. I'd put money on their being more components in the electrical system of an old aircraft than a modern digital era one.
Then of course you get to the pressure hull which has a limited service life regardless while older aircraft as long as the wing spars etc are not stressed can live a very long time indeed.
While technically they can out run an RAF interceptor...they can't outrun a missile it's not really a concern I'd imagine other than the optics of shooting down a civilian for being an idiot.
First point, That's a concord not a lightning.
second point that is a 3 man crew aircraft with 4 engines and the ability to super cruise where as the lightning only has a a crew of 1 and is not able to super cruise. then on top of that yeah the concord will have controls there for 4 engines, 4 lots of engine monitoring gauges (all down the middle of the dash. there are two sets of duplicated controls for the captain left and first officer on the right. the controls for the auto pilot along the top.
throttles in the middle, trims to the left of the throttles, radio kit behind the throttles, everything on the right handside behind the seats is the flight engineers desk. while all those buttons and dials look like a lot, they are much the same as any commercial jet still flying today.
The lightning is not a pressurized aircraft and therefore does not have the fatigue concerns with pressurization cycles of a commercial jet.
Concord first flew in what 69? didn't enter service till the 70s so it really wasn't 50s tech, you are comparing apples and pairs here.
Look this is the cockpit of a hawker hunter a jet aircraft of which there are several in private ownership and still flying in the UK
This is a English Electric Lightning
What does this prove about the complexity of the aircraft. Really nothing at all. The hunter on the face of things would appear to be much more complex, yet this is allowed and is a mach 1.3 aircraft, where as the lightning appears less complex and is a Mach 2.2 aircraft?
The hunter is older and by your definition more complex due to those older components.
If I told you though that I can look at the dash of the Hunter and pick out all the same gauges and dials in pretty much the same places that you would find them in a Cessna 172 you'd probably not believe me. obviously your average Cessna doesn't have all the switches and buttons for guns and ordinance.
As is shown in the documentary every time the CAA set a rule and they where able to meet it with the lightning, they then changed the regulations again so the people wanting to keep the lightning flying could never meet what the CAA wanted.
The other issue with mass produced aircraft is they have to be authorized by the manufacturers for use I'e on a plane like a cessna 172, Cessna set the rules by which the plane has to be maintained to be air worthy and on an aircraft like this, they have to have parts supplied by the manufacturer. BAe I believe are now the people who "own" the lightning and if they don't want to deregulate the lightning and they don't supply new parts then it will not be able to fly end of.