Trying to steer this thread back on topic for a moment, many nations face the prospect of obsolescence in their air forces but can't necessarily buy the latest top of the line kit (by which I'm directly implying the F-35 in any of it's flavours). Many of those nations would probably still like to buy western tech if possible, but their price range will likely limit them to Russian or Chinese designs. Meanwhile the enormous cost of developing the F-35 will keep the unit cost higher than certainly western nations would prefer.
So, for the sake of debate, would it be a sensible move to offset the development cost of the Lightning by adapting some of it's systems/avionics/etc to a lighter cheaper (and yes less capable but more affordable) airframe design that could be bought in significant numbers by 'third world' nations for whom the Lightning is a pipe dream and Mig, Sukoi or Chinese aircraft might be a step in the wrong political direction? The parallel that comes to my mind is back in the sixties when the F-4 Phantom was 'king of the hill' and the F-5 Freedom Fighter was a very palatable substitute that could be bought in large numbers. Quantity has a quality all of it's own, and when a Nation is thinking in terms of purchasing just 24 fighters for their air force, that isn't even two sqns, it's one frontline sqn, a training flight and a few attrition airframes. A Nation the size of Argentina which we have been discussing has a large geographical footprint and a frontline force of 12-14 fighters from a buy of 24 seems utterly inadequate for the task IMHO.
Is it a better idea alternatively to make the F-35 itself more affordable to these nations and bring down the unit cost through a larger overall order, spreading the development costs across the production run? My personal feeling is for the next two or three decades, the F-35 will be the only serious game in town and you either buy them or you will lose your next fight. But that's just my two cents worth...