What's wrong with riding a bike in 0 °C weather? When dressed for the weather riding in the cold weather can be quite enjoyable as long as the roads are clear or your bike has appropriate tires.
Not as enjoyable as sitting on my heated leather seat, sipping coffee, listning to an audiobook and moving my right foot back and forth between the the accelerator and brake while my wipers and heater keep the sleet off the windshield.
If you objectively think that riding a bicycle with two sets of clothes on your back in the dead of winter is as convenient as driving, you've are either delusional or have never actually been inside of an automobile.
If you objectively see convenience in spending 50k on a car, 30k on a parking spot, and 100/mo for insurance just to be able to pay other marginal costs to be able to go to a store and avoid exercise in the morning, you're either delusional or have never considered how that money could buy you better conveniences.
I'd recommend anyone give it a try if there is a safe way to get to work. Especially in 0C, because it's just not that cold and you don't really need bulky layers. You can get away with just a winter coat or a warm fleece and windbreaker. I dress a little lighter than when I go downhill skiing or snowboarding.
I am still wearing a winter jacket and sometimes an extra layer when I am driving to work in the winter, so there's really no difference from that perspective.
Also, if you're traveling by bike in freezing weather, you have to be dressed for freezing weather, and you'll be stuck with that during the entire time you spend at your destination.
Gloves needed at 0°C are reasonable. Sure, don't take gloves that let the wind go through.
I used to bike without gloves and a hat when freezing. Because I always lose them. The hands hurt, you end up being very cold. With appropriate clothes it's night and day, biking becomes enjoyable in winter.
Great. I'm going to the mall. How do I remove my clothes while I'm there?
Yes, you need a backpack or some sort of bag. Is it a big issue? If it's not raining you don't even need the overtrousers and the coat might as well be the one you usually wear when it's cold. This coat probably has pockets big enough that you can put the gloves and the hat in them.
Not my sense of comfort.
> as long as the roads are clear or your bike has appropriate tires.
I live in a country where we have snow in winter, at least casually. I think driving safety is severely affected when driving single-track? Wouldn't ride my motorcycle in winter either.
That said I live in a snowy country and ride a bike. I absolutely wouldn't ride a motorcycle. Speed is by far the largest reason. On a bike, you can see black ice before you hit it. You can run a foot along the ground for extra traction. You can get out and walk and push your vehicle. You can just jump off if shit really hits the fan.
That said, I also ride slowly when the roads are poor.
Where I live, it's not usually safe to ride a bike because of snow clearing. We get huge snowbanks and there is no safe place to ride. I'd be riding if I could though.
We do have off-road trails that are groomed for fat bikes that are a lot of fun. It's a nice alternative to downhill skiing or snowboarding which can get pretty pricey!