What about the airplane given in the original example, the F-100, whose design predated the integrated circuit by something like a decade? Presumably control so

What about the airplane given in the original example, the F-100, whose design predated the integrated circuit by something like a decade? Presumably control software improves stability, but otherwise the aircraft behaves in a predictable manner above and below Mach 1 as supersonic control software is a relatively recent addition.