Well a big part of this is that I'm trying to get into slightly larger companies than I've been at in the past, and the companies are brand name SV companies with very high standards where they tend to have pretty rigid hiring processes even for referrals. I know a handful of people at these companies, but none of them are hiring managers, and none of them are from my most recent two jobs (ie. the last decade) to be able to vouch for my recent experience. Also, out of a 16 year career, only 5 of those years were in SV, the other 11 were split between London and US flyover country, so my network is pretty dilute in SF.

Truth be told though, I haven't reached out to much of my network because I don't just want any random job to pay the bills, I am looking for a specific kind of company and experience. If it keeps going like this though I will probably need to broaden my selection.