Iran has been able to reverse engineer many of the parts for the airplane, they remain a formidable threat. Would the IRAF use them? Good question.
Here’s the analogy:
Your neighbor has a deer rifle. He said he will kill you. You are now at war. You have opportunity to break the deer rifle while it’s still in his living room.
Do you do that while you can?
Or wait until he brings it out and points it at you to try and shoot at it?
Only a fool would choose the latter. If you can kill the airplane while on the ground, you win the dogfight that never happened. If it does fly, maybe you win, maybe you don’t.
Again, depends on the operational objectives, the integrated priority target list, but, in general, you don’t want face a 4th generation fighter in the air, particularly if they have effectively reverse engineered it.
Iranian Air Force pilots have hundreds of kills over decades of conflict. They remain a credible threat with that airplane.
Here is a recently refitted one. They not only fly, they still have missiles, and the Iranians have had help doing the reverse engineering.
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Air to Air refueling is a critical enabler. The IAF went after the tankers early on.