Vietnam is a communist state; they are simply looking for protection from the US in exchange for trade. They are not “reformed”.
You spent any time there in the last 20 years? I have. a lot.
They are looking for protection from China.They are not terribly worried about trade. They do that very well. Tee, it is not your own back yard, but it is a very pleasant place to visit.
The Vietnamese “Communists” realized that Communism was a mistake back in 1986, but they just wanted to keep their power.