[Nick Beale]

"The RAF had begun its trick of getting rid of under-performing air-superiority fighters … Spitfires …"

The Spitfire was an " under-performing air-superiority fighter"? Granted the Mk. V was overtaken by the Fw 190 but the Mk. IX was a viable air-to-air combat aircraft from its introduction until the end of the war, was it not?

"The RAF could not foresee the time when the GAF had lost command of the sky over the Reich and with it the means of shooting down conventional dive-bombers."

But as it turned out, the only mean of bringing about that German loss of command was to build fighters in huge numbers.