Approved housing, not the only kind, increased 418 units in San Francisco this past year per the SF Chronicle, "the lowest number since 1993. Worse, "When demolitions and removal of illegal units were considered, the net increase was only 269 units..."
So the paper says the good news is, there were approvals for future construction of a larger number of units. But the future approved construction won't really be enough either.
Except, what's "housing"?
Meanwhile, does anyone keep official count of the number of inhabited vehicles, and whether those have increased? As long as vehicles are in truth functioning as housing, could the fact be recognized, and some help, security and stability provided to the people involved? The city's continual state of denial that unconventional housing even exists is getting not just cruel but foolish.