I don’t live there, but as a general rule, people overestimate the probability of “collapse“. Things can be declining for a long time without the dramatic acceleration that merits that term.
This can't be posted enough. Twitter currently employs 100x more developers than Mastodon. It's comically incoherent to claim that people should move from Twitter to Mastodon because Twitter obviously can't be run by half or a third of the developers that it used to have, because scale or something.
Collapse, in this article’s context, means insolvency. That doesn’t mean San Francisco disappears. But public transit may halt for a while, and the city may have control and assets forcibly removed from itself.
In reality, San Francisco is solidly investment grade [1][2]. It can borrow its way out of this hole.
[1] https://www.fitchratings.com/entity/san-francisco-city-count...