None of the above.
I prefer to commute using a bicycle because they're fun to ride. In/on a motorized vehicle, I want the commute to be over with as soon as possible, it's an attitude that appears to be shared by pretty much every motorist regardless of what they operate. But riding a bicycle is quite another dimension, the human scaled characteristics of bicycles allows things like greeting other cyclists en route, makes it easy to stop & talk with someone, or talk while en route. You can also warn "on your right" or such before passing someone, you can also actually see the people you're interacting with, and so on. Motorists "speak" to each other with horns, insults and middle fingers, etc. Cut to the left, squeeze to the right, I want to get there fast, frock everyone else. It's as if they feel no kind of shame while in their anon suits... Seems to work this way for everything from pickups to scooters. For some reason though, big rigs appear to be exempt from this rule, they have very well tamed drivers behind the wheel. Probably a very good thing too... In a nutshell, that's why I ride a bike, and why I got rid of my car. If it takes twice longer, so what? I get quite a lot more then twice the fun in the process - a very good investment by me. During rush hour, I seem to pretty much par with cars anyways.
Winter slows me down a lot & reduces my range significantly. Power assist from an electric bike can help to equal summer commuting times through winter.
Even though they're limited to 32km/h, an ebike boosts my speed on the flats by taking the grunt out of start/stopping, so the effort I didn't produce to go from 0-32, can be used to get into 35-40, and I can hold that up so long as the next light or stop isn't too far away. It also boosts speed by helping hills go by a lot faster.
I also have a big ass trailer now that I no longer have a car, but even empty the extra weight makes a bike very substantially slower to accelerate. When stopped with the trailer loaded to capacity, say at a red light on flat land, the light has the time to turn green and turn back to yellow again by the time I've crossed the intersection. Can't go up more then moderate inclines either, and it better be very short or it's not gonna happen. Power-assist can help here too.
And that's about it.
Downside is that it completely kills off the fun of racing with other cyclists during commutes, a thing that happens often and is a lot of fun, another thing that you just can't do (regularly) in a motor vehicle.