Free cake at the SFO departure area. Some tasty lemony thingie.
The first few rows of E+ got leftover champagne from C before departure.
Aside from that and the inaugural flight certificate, nothing notable that I recall.
The flight was about 80% full in F, C and E-, but only 60% full in E+. Seemed to be more flight attendants serving the flights than usual. As usual, they ran the gamut, from super helopful to begrudgingly professional.
Before takeoff a gray-haired executive came through the cabin to welcome passengers. He helped a few C passengers stow their carry-ons, which I thought was a bit of bending-over-backwards-overkill.