Whilst stop watch and map may be valid for honing basic airmanship skills, isn't it's retention at AFTS stage a Cold War hangover?
On current Ops if you get nav etc dump then you are out of it, to continue makes you a bloody nuisance and risks snagging the ATO for all involved.
You would also never be allowed a weapons pass with degraded kit for collateral damage reasons.
Pressing on regardless with degraded nav kit was indeed relevant in Cold War days of yore, did it (pracrice of course) many a time out of Bruggen in good old FGR2 days, but that mission has gone, we don't train for it and we no longer have the buckets of instant sunshine for which it was REALLY relevant.
My experience of electric jets is limited, as I suppose is the RAF's, GR7 and Hawk 115 apart, but we do need to make sure what what we train for today is relevant.