I could imagine the SH / Growlers filling a variety of non tactical fighter roles well into the future, filling gaps we have had for years. Apart from the obvious, fast FAC comes to mind as does tactical rec.Even before the Super Hornet buy the RAAF had plans for a Growler capability to be acquired by 2030 to counter advances in GBAD capability. It is a different kettle of fish to have an additional single squadron flying an electronic attack platform in addition to the two wing air combat force with a single strike fighter.
No that’s not remotely true. In the late 1960s the Govt. abandoned plans to buy a new fighter and upgraded the Mirage to last until 1980. In the late 1970s the Govt. put off plans to replace the Mirage by 1980 and upgraded it again so it could last until the late 1980s. There was never any project shuffle to hold off until the F/A-18 was available. It was just like the 2002 decision to wait until the F-35 was ready all about saving money.
It would have been interesting to see what the RAAF ended up with had they followed the original schedule. The Mirage F-1 would have been up there while the Phantom is probably what the RAAF wanted, I also remember reading that Australia came very close to ordering 100 Jaguars although imagine they would have been intended as advanced or lead in fighter trainers rather than fighters. I wonder if a new order of fighter each decade would have been sustainable?