You rely on the power grid for gasoline too. Gas doesn't pump without electricity. Also, refineries are a more concentrated source of failure than power stations and a grid.
Plus, an electric car (or any valuable car) is prime target during civil unrest. It's fun to destroy expensive stuff. It's not fun to destroy a mid-2000s Civic.
I think it would be easier to find a battery storage in one of the houses that have solar panels (like 50% of them in my neighborhood) than a gas can.
The only time I didn't have one was when I lived in apartments.
My in-laws have a larger property but they also go with electric based tools, but yeah one of their neighbors does have such lawnmower (I would probably buy robot one, but...).
But you are right I forgot that there are tools that do require gasoline, 30 years ago those gas cans were used for storing gasoline for use in a car or motor (when I lived in apartments).