War is boring's reporting on the F-35 has biased and is considered among defense reporting to be very un-reputable. "Jack of all trades master of none" is followed by "is better than master of one". It's replacing the F-16 which also was a multirole and did it damn well. The A-10 is just no longer an effective weapon. A turbo propt is better when you're fighting while having complete control of airspace and a F-35 is better when you're fighting in the presence of very advanced air defense systems. The A-10 is old and doesn't fit into modern warfare.