There is never a "never" in international relations.
Turkey has even more advanced facilities to sustain their F-16s and for as long as the American support was there, they could even enhance but now find themselves extremely constrained in modernizing their own fleet simply because the interests no longer converge.
French don't have to sanction, they can simply raise the cost of support. Nobody else can provide sustainment for Rafale. It does not take a lot for the Western block to align very quickly as seen in the case of Turkey, a NATO member.
You take out the American and French assets, EAF becomes extremely constrained.
Also when you say it cannot happen, keep in mind that all it takes is one government change for this "never" to be negated. All this gear is good for beating up insurgents and pushing back on Turkey etc., because the western block approves it, but as an example, were things to get hot with Israel then this "never" would fizzle out in a heartbeat.