And if any of the distances between your errands or home are too much for you to walk, a frequent public transport network makes it easy to just hop on and off as needed, and not have to worry about parking. And for carrying a lot, cargo bike rentals are really cool, but just paying for delivery works well too.
Bikes work just fine when it is freezing.
Source: Have biked in sub zero often.
Btw it is possible to plan cities so you are not car dependent:
If I need to run some errands: I walk
If I need to go to the doctor: I walk
Hardware store: I walk
Do I need 80kgs of crap at home? Seldomly, but if I need it I put it in my bike trailer.
And if any of the distances between your errands or home are too much for you to walk, a frequent public transport network makes it easy to just hop on and off as needed, and not have to worry about parking. And for carrying a lot, cargo bike rentals are really cool, but just paying for delivery works well too.