The last of the medium-bombers. Peacetime militaries tend to purchase equipment without regard to wartime utility. “Cost-effectiveness” calculations frequently ignore factors relating to wartime utility.
Early in Afghanistan the USN was running F-14 “Bombcats” north to fly topcover for the SpecOps and Northern Alliance militiament. The F-14 had great legs and a respectable bomb load. Try doing that with the F/A-18. You don’t get near the coverage and you don’t have as many weapons on station.
I wouldn't say 'last.'