The Raven wrote:
There's a couple of issues here.

1. What is the current capability requirement of the F-111?
2. Is that capability requirement still relevant?
3. Is there a more effective means of meeting that capability, perhaps in a
different role?
4. Assuming the same capabilities are required, does anything do that?

http://f-111.net/CarloKopp/Defence-News-2908-P8.pdf
The idea of killing off the F-111 amounts to killing off the potential
political payoffs from its use in coalition campaigns, and if
substituted with smaller aircraft, imposes an extra burden on the US
tanker fleet. The alliance issues arising in the PacRim from the loss
of the F-111 are thus repeated on the global scene.

-HJC