The B model has issues, but hilariously it seems to be avoiding the worst problems of the other variants. Wonder why?
Even if gun pod is more reliable than the A model version, what's really needed is good maintance times and reliability for the aircraft itself.
F-35B accumulated flight hours is 45,000 flights, thus short by about 30,000 for the 75,000 goal.
This bit seems to indicate to me that there is still quite a lot of work to be down for nailing down longevity and reliability of the B model:
"The program secured funding and contracted to procure
another F-35B ground test article, which will have a
redesigned wing-carry-through structure that is production
representative of Lot 9 and later F-35B aircraft. Testing of
this production-representative ground test article will allow
the program to certify the life of F-35B design improvements.
The production and delivery dates are still to be determined."
The A model is 25,000 passed the flight hour maturity goal with its 100,000 yet still has availability issues.
It might take 10 years until squadrons of F-35Bs are fully operable, always ready to be scrambled, available for successive training and joint-training, and ready to go when on patrol and at sea training going through high tense areas like the SCS where readiness has to be at least 80% thus if is not, is not serving the role of deterrance.