The trick is when you overdress and need to remove layers, where do you put them? One needs a lot of onboard storage to store more than one removed garment...
Being cold causes the voltage to drop, which does result in less available power, and below a certain temperature, batteries won't charge effectively. (Lead-acid are the best in low temperatures) Note the comment below the table below.
Source: https://batteryuniversity.com/article/bu-410-charging-at-high-and-low-temperatures
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I guess this is why Lead-acid batteries are still used in cars in cold climates instead of Lithium.
I just looked up studded tires for my hybrid bike; (700c x 45) they are quite spendy! I would have to do a lot of snow/ice riding to justify them, and I certainly couldn't justify them for more than one bike:
When the commute turns icy, turn to the 45Nrth Gravdal Studded Bike Tire to keep the rubber side down. This 700c x 38 mm wire-bead tire features 252 steel-carbide studs in ovalized groupings across the casing that bite into slippery winter surfaces. Siped tread lugs provide additional traction...
www.biketiresdirect.com
Going to look up studded tires for my incoming Juiced HyperScrambler 2 eBike and see if more are available, as this is probably a more popular size for eBike tires.