Fictional Foreign operators

I have always wondered what it would have been like if certain potential operators actually got to fly their intended planes e.g
A-7 for the PAF which was never sent to them as they got the F-16

Likewise I wondered if the PLAAF would have gotten the Su-15 as an interceptor in the 80s ( had soviet-chinease relations warmed up in the mid-80s) ? Su-15 was certainly more advanced than the F-8 II finback and would have come at a much cheaper price esp when western countries embargoed china in 1989.

Can anyone think of more examples ?