Oddly, Ederer's reasoning, according to the Aussies, is out of concern for the X6 M, whose sales the X4 M would apparently cannibalize. That's like saying the M3 doesn't make sense because it will cannibalize M5 sales - the logic just doesn't really hold up. "The question is what customers are we talking to? And are we talking to someone that is willing and able to afford [an X6 M]?" Ederer told Car Advice.
Car Advice seems to feel the same way, claiming the X3-based X4 will share its powertrains with its donor platform, and will eventually spawn an M variant, albeit a few years down the line.