Businesses shifting to partially or fully remote (the key metric surveyed in this article) isn't necessarily an exodus from SF. It just means a decline in the need for office space in SF.
Additionally, other sources indicate that most SF residents who left moved to nearby areas [1]. (Those areas themselves may see their residents moving elsewhere)
That's not really surprising. A lot of people like California and, if you don't need to worry about a daily commute, that opens up a lot of options that, if not exactly cheap, aren't as eye watering as the Bay Area.
Additionally, other sources indicate that most SF residents who left moved to nearby areas [1]. (Those areas themselves may see their residents moving elsewhere)
[1]: https://www.kron4.com/news/bay-area/exodus-study-reveals-dra...