That’s incorrect. The avionics to use amber racks would just be a software update. ADCP II is more than capable. Could they just plug them on any jet currently? Probably not, but that has more to do with not putting the money in for it as the capability isn’t necessary. Could they be upgraded for it? Most definitely.
The F-15EX did not rip out the computers. It ripped out the mechanical linkages for the flight controls.
That too. And the second, equally important thing is the effect on the aerodynamics of the aircraft. With the movable intake ducts, it was possible to reduce the size of the stabilizer, this led to a reduction in trim drag and weight savings. It also delays the flow separation along the fuselage at higher AoA.
Yes affecting the air to the engines is a major activity , not many know that is not all they do.
From technical paper :
This rotating inlet, which is well forward of the center-of-gravity, has a significant effect on aircraft
longitudinal stability and control across the subsonic/transonic Mach number spectrum
of the F-15.
McAir chef of aerodynamics quote :
Unique feature of the F-15 propulsion system is the movable first ramp of the inlet. Some of the details of this feature are indicated. The movable ramp is relatively large and is far enough forward of the center of gravity to have a significant effect on longitudinal stability and control characteristics and trim drag.
I have reviewed the articles on measurements in wind and water tunnels :
Water tunnel measurements showed that dropping the upper surface of the inlet resulted in a delay in the flow separation along the hull by about 5 degrees of angle of attack
Without this mechanization, the F-15 would have been less maneuverable and less powerful.