"No ground jobs" needs a bit of amplification. There were plenty of jobs for NCA that were not even on airfields. For obvious reasons some have disappeared but will undoubtedly returned with the return of the Nav/AEO/AEOp specialisations. WSOp were employed in Acoustic Analysis and intelligence roles. Whether these jobs will be manned by int branch specialists or by WSOp I don't know. Then there are instructor roles many of which are best delivered by aircrew with recent operational experience.