At this point, it's hard to say if you're looking at blips or systemic trends. There are certainly reasons one could imagine that there's a more general exodus from San Francisco and the Silicon Valley sprawl more broadly. While I generally like SF as a visitor, the negative side of the ledger gets longer with each passing year and most of SV broadly doesn't have much going for it, especially for the CoL, except for its access to places that are actually nice. So if people don't want/need to live there for high-paid tech jobs I can certainly imagine many leaving, at least to the point where CoL somewhat adjusts to sustainable levels.