It must have changed a lot since I lived there in the early 1980’s.
The outlying areas underwent a lot of changes re shopping centers and decent home developments.
There was an attempt to revitalize the downtown area. Like most cities that failed because the thugs, hookers, dopies and their dealers stayed and did their daily things there.
Vallejo could be a jewel in the bay area if the thugs and unions didn’t control so much of it.