There's really no way to tell, as the US and other western countries haven't been involved in symmetric warfare in recent history. Will the F-35 be able to pene

There's really no way to tell, as the US and other western countries haven't been involved in symmetric warfare in recent history. Will the F-35 be able to penetrate air defenses and strike an S-300 battery? Is its radar good enough to detect and engage a J-20 without exposing itself to return fire? Those capabilities have never been tested (and hopefully never will).