Sure, but SF is temperate year-round. Winter weather cycling's definitely doable but I immensely prefer cycling in SF year round, where I don't have to plan ahe

Sure, but SF is temperate year-round. Winter weather cycling's definitely doable but I immensely prefer cycling in SF year round, where I don't have to plan ahead or remember any warm gear. And I find not being able to bike for errands surprising, unless you lived outside of SF proper? I exclusively ran errands walking/biking/by bus for several years.