At least. You should understand that the USAF is an expeditionary force, meaning we will tax our F-16 fleet more than other F-16 flyers will. Russia is a bad deal, and am not saying that because Russia is a US adversary. The Russians are renting out their front line fighters for tourists. That is how the Russian Air Force supplement its operating costs. The long term reliability of Russia as an arms supplier is dubious and even the Chinese knows it.
The F-16 is combat proven and is an accomplished flyer in all but the North and South Poles. The single engine fear is done -- not worth debating. The avionics architecture is reliable and was the pioneer for
ALL advanced flight control systems today, civilian and military. No jet from Russia and China can claim that. In fact, the A/B analog flight control computers are still flying in test jets out at Edwards AFB and the Thais are flying the A/B analog jets and upgrades will extend the jets out to 2035. But if Viet Nam get the later digital blocs F-16, it will make the VNAF a more formidable deterrence to any potential adversary for at least 20 yrs out.
Thailand – F-16 Mid-Life Upgrade | The Official Home of the Defense Security Cooperation Agency
The problem here is that the Vietnamese government still have enough ideological dinosaurs, with appropriate small brain sizes, to believe that Russia is an ideological ally in the mold of the Soviet Union of old. These fools
WILL make the wrong decisions and will leave Viet Nam vulnerable to Chinese aggression.