I know, RSAF wanted similar deal to Block 60 DF US refused it was a strategic blunder on behest of israel but US learned its blunder a costly one realized with Typhoon deal going to UK and now they offered F-15SA but I feel RSAF should have ordered F-35s and upgraded current F-15s to SA standards.
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Aeronaut, clearly it is offered by indians not asked by RSAF but what is so special about it, entire stuff is made in france and israel and USA, with weapons from all 3 states compared to Thunder which can offers weapons from reliable partners like China/Pak. You mentioned Block III i think there is enough time around 4 years more money poured in a program a small stealth aircraft is possible smaller than J-31 development from scratch or based on JFT is possible but again it is about reliability of partner like KSA with no US pressure and real commitment not leaving in the middle, the AK-1 was a very insulting one i think of it personally.