I am not leaving San Francisco. It's beautiful here. I'm excited to see it get weirder. I will always choose to live somewhere that is exciting over somewhere that will be the same forever. Everything about San Francisco has always been "temporary." This city is boom/bust, constantly changing. It's interesting, having a front-row seat to the ways that people and culture change over time.
Some of the most interesting, most cherished times for native San Franciscans was the 60s/70s, when crime was way higher than today, there was no real tech presence, and the art scene here was booming. It was expensive then, too. It's probably always going to be expensive to live here.
If you're here, you can probably already feel the city starting to get into the bust times, the times when the culture really starts to get shaken up and things start evolving into something new. It's not for everyone, but for a certain kind of person — it's better than anywhere else.
You probably won't agree with me, and that's okay. I don't expect, or want, everyone to. But the changes I've seen in SF recently — personally, I like them. There's so much potential.
EDIT: The level of hostility in the comments here is a little staggering. Please, readers, consider that others may have a different perspective than you. Obviously, I am not condoning any further human suffering. If that's all that you can see in my comment, consider if the cynicism in your comment may effect others.