I get where you’re coming from but SF is full of busses, it has trams, light rail, (even some cable cars!) and a subway. A couple of years ago it was stuffed full of electric scooters. Bikeable areas are constrained by the hills or practically impossible due to the road layout (bus lanes, tram tracks, crazy Victorian street plan) pedestrians who go literally anywhere they want at any time, questionable grid system that inhibits walkability with endless crosswalks. Changing anything significant costs billions of dollars. We don’t have any credible solutions to these. It’s like a massive technical debt where you can’t rebuild and every fix breaks something else.