The two major regional banks in Northern California are San Francisco based First Republic and San Jose based SVB. First Republic specializes in HNW Personal Banking, while SVB historically specialized in small business banking. The same issues that hit the VC industry rn with SVB are hitting the Wine Industry in Northern California as well because they primarily worked with SVB because SVB specialized in SMB B2B in NorCal.
Different banks target different personas. There were a couple other regional B2B Banks as well but they all mostly died out in 2008 and SVB was the last one left.
Also, historically, San Francisco and Santa Clara Valley (what is now known as Silicon Valley) weren't that closely integrated until the 90s and early 2000s (less of a NJ-NY type relationship and more of a DC-Baltimore type relationship historically)