Joint strike Fighter Replacing Harriers and Tornado gr4s

hi there

i was reading in an R.A.F Magazine i bought that the Joint strike Fighter is going to replace the harrier gr3/4 and Tornado Gr4s i think that is stupid because the harrier and Tornado have been in the service for along time and they seem to be getting rid of to many aircraft

what are your Oppinions?

Thanks

Nathan