The Leaf is somewhat famous for having poor battery management; it's one reason we avoided them. I don't think a used Leaf could handle a 50mi roundtrip commute, especially with a 10yo battery.

The Fiat does have a range penalty for cold weather (it occasionally gets below freezing in the part of California I live in) and running the heater (one way; usually it's warm enough by the trip home). My wife still gets home with > 10%.

Keep in mind this is a 10yo car with an 80mi range; newer cars have bigger batteries.