Late Arm Live,
Of course.
The Jaguar could not do some of what a Harrier could. It was never suggested that it should REPLACE the Harrier.
The Jag was:
Never going to go on a boat.
Never going to carry some of the weapons.
Never going to be as good hot and high.
But it was able to do enough to allow it to have been a useful relief for the Harrier and to keep the Harrier going.
Years ago, before the present unpleasantness, and before the present operational tempo and utilisation, and when JFH hours were being spread over FA2 as well as GR7, the IPT estimated a huge number of rear fuselage replacements would be required to see the jet through to its planned OSD.
With other age and fatigue related programmes you're looking at vast amounts of money.