Best story I heard about the F-111, from a former coworker.
F-111 pilot training had a 'final exam': Instructor would have you fly to a spot in the Arizona desert, turn in the correct direction, and go to Terrain Following (radar driven, skimming the ground). "Final exam is keeping your hand off the controls, you touch them and you flunk." (If you touch the controls, TF turns off and doesn't turn on again if you let them go.)
Seems simple, you're flying over the flat desert.
Until you hit the Grand Canyon. Ground falls out from under you, plane goes into a nose dive towards the canyon floor.
Plane will pull out on its own, unless you try to help.
I believe they have been retired for nearly 10 years now as the RAAF purchased the F-35s and F/A-18 E/Fs. Many of their early model F/A-18A/Bs were sold to Canada, which still operates the type.
The F-111s were used for many years but didn't have a future with only a small number in service, so parts & maintenance were an issue. After stripping any valuable parts, the F-111 air-frames were literally buried due to asbestos.
The new F-35s help provide the RAAF strike capability now, along with the F/A E/Fs.
While never purchased (the USAF bought the Republic F-105 instead), it offered great performance. Loosely based on the F-100, it had the same basic wing and tail, but had a new intake, cockpit and much stronger engine.