Vietnamese SCS stuff is for political theater and the government knows it, which is why China mostly bullies Philippines. It's ez pz to bully the Philippines (actually, justifiably striking back against their aggression) and make their sponsor look weak.This is indicative of how serious the problem is in Vietnam. Foreign firms including Chinese ones actually bring in backup generators and build their own roads in Vietnam, typically connecting their factories to the main roads (local government can't be bothered), obviously not large scale infrastructure. If businesses are complaining now it means the problems from 10 years ago still persist or have worsened.
I used to go to Ho Chi Minh City often back in 2013/2014, my local associate and guide (Vietnamese American from Connecticut) informed me that local Vietnamese can't do infrastructure, everything from tunnels, bridges and airports were built by the Koreans and Japanese. I was mistaken as a Korean on several occassions. Northern Vietnamese provinces depend on imported Chinese electricity from Yunnan and Guangxi, and very likely still do to this day. They act tough in the SCS, but they should know if the shiit hits the fan, the switches in those Yunnan and Guangxi powerplants go off, and its romantic candle time in Hanoi.
I wouldn't be too sad if Vietnam is allowed to keep a few islands for their loyalty once the hegemon and its puppets are kicked out.