Re: Carriers??
However this may be because modern engines are a lot more reliable.
I'll wager that the scientific advances in some areas of design and manufacture are greatly offset by the incremental complexity of the F35B.
Whilst complex, the F22 is simpler than F35, but even after an "improvement programme" only achieved 70% mission availability, so I'm guessing that in service the F35B will be around 60% even after similar improvement. So in rough numbers, each F35B will be available just over half of the time.
Which doesn't bode well for in flight....