This is my hometown. The homeless camps were becoming more and more visible before I left in 2021. And for every visible homeless person there were at least 10 living in their cars. Industrial parts of town with vacant buildings would have cars and RVs parked all along the streets.
San José used to be affordable. When I left it was the most expensive real estate market in the country. It's got plenty of space, but none of the developers are (or at least were) interested in building housing except for the tech workers who'd been streaming into the area. And the land prices reflected that. High-end developments were going into formerly low income parts of town.