One summer a job was across the our small lake, a 40 minute drive by car, but maybe 10 minutes by boat as the crow flies. Sure, I got wet during rain and wavy days, but clothes get dry, and it sure was convenient.
I often wondered, if the job was in SF itself, do people take boats to get to work? If so, why not? I presume docking costs? The place I worked had their own dock, so ... "sure, just tie up over there every day".