In my experience, the menu in general (not at SF in particular) took a turn for the worse somewhere around 2000... around that time (shortly after, IIRC) the SF one moved from on Van Ness (which was walkable from where my then-girlfriend/now-wife lived) to the much more touristy location at Pier 39, and prices went up significantly.

I've only been back a couple of times since the move, although I do usually stop in once when I'm in a new city outside the US that has one.