Perhaps someone in the know can tighten me up - but when we did a study into the hours, both in the simulator and aircraft, for which we had budgeted for the F-35 pilots - it was borderline whether they’d actually be able to use them all if each and every trip benefited from a decent mission planning cycle.
Of course, some will contend that some hours should fall into the ‘simply slip the surly bonds’ category or indeed the ‘pitch up at sim with no AEA and run through some emergencies’ bucket...FWIW I disagree!