The bigger problem is NATINADS: how do you integrate NATO equipment (IFF especially) with Russan SAMs?

And, removing Turkey from the F-35 program is both political retribution and to stymie intellectual property from finding its way to Russia/China. In the past, it would've been unthinkable to sour relations with Turkey because of its geostrategic importance for NATO/US land-based missiles and airbases.. but sub-launched ICBMs and other countries more than/almost make up the difference. It's sad Turkey-US relations are souring at present.