I'm a tech expat living in Vietnam (from Bay Area) for the last 4 years. This is a really loaded question. You have to look into the politics of the VN govt, especially related to the fact that it is on the northern end of VN, closer to Hanoi... which has different politics than in the south.

I've been to Hai Phong, which is the city in the north near the China border where most of this commerce happens. It is fascinating to see how big the houses are there. If you drive along the road to the airport it is literally filled with old men riding their nice shiny new bicycles and exercising by the side of the road.

The tariffs definitely have people looking into Vietnam a lot more. I've driven (motorbike) the dirt backroads near the Chinese border where there is nothing but trees and mountains. There are literally trucks brining goods into and out of Vietnam (illegally) on hastily constructed dirt roads. You can see it in google maps even. I've seen how people have strung cables over rivers between China and Vietnam to ferry goods back and forth. So yea... it is happening, it just isn't hitting the news much. It is also happening in Cambodia and Laos. Look into the roads China is building and how Sihanouk is a literal Chinese eco disaster.

Fascinating times...