a. 10 years is hardly just "soon to go out of service."
b. so if 1 aircraft has a capability you never give it to any others? Don't forget F3 already has lots of capability that SHar doesn't. (ASRAAM, JTIDS, multi-crew, speed, turn performance(!), EPM (or is it ECM)........., but what have the romans ever done for us?
Keep smiling, none of it really matters!