PG's thesis was building a new Silicon Valley requires a critical mass of nerds and investors in one physical location.
Even with the rise of remote work, I think this still holds true.
Everyone can move to random places around the US, but ultimately, I think they will feel lonely because they're not surrounded by other like-minded nerds.
No magnitude of Zoom meetings can simulate the feeling of being physically surrounded by others like yourself.
With no clear alternative for physical location, I think everyone will come back after shutdowns end.