One reason could be cheapness, but I have doubts the savings from buying JF-17s in place of J-10s will offset the operational costs of having two different platforms requiring different maintenance.Major thought is. What major positive and negatives does the JF-17 offer over the J-10, which is already in full production, with production lines already running. J-10 is better in the JF-17 in all areas, why provide something that will require replacement soon after production? J-10 has more potential and can remain in service longer