Exactly! Orac has summed it up precisely.
If the Sea Harrier's AD capability (its OS/BAI/Recce capabilities will all be retained by the carrier wing through the GR9) is to be judged as vital as you would wish, in today's financial climate, with competing demands on resources it would have to have been used regularly (it hasn't) and in circumstances where no alternative was available or even possible. In the Adriatic, Sierra Leone, and Telic, this was not the case.
So, in summary:
1) It's a rarely needed capability which can be provided effectively using land based air power and/or allied assets
2) It's increasingly irrelevant to post Cold War and littoral operations
3) The capability gap you're whining about will be exceptionally brief