de-icing in the mid-atlantic is very common above the Mason Dixon line as its also basically the snow line.
Not always salt though. Some places are sensible and use sand or calcium chloride salts that are far less corrosive. Some even use a glycol enhanced mixture. Less damaging to roadside vegetation AND cars, you see.
The SOTNY just uses salt (sodium chloride).
they're in use even down in central Virginia where I am but we dont get as much icy weather as DC and up.
Different places use different deicers.
and garaging is necessary in warm regions as heat is a real problem for them as well.
It can be, but only when driving. The battery must be cooled.
hydrogen has problem of its own but it seems like a stronger candidate overall.
This is a fuel and not an EV.
Hydrogen must be manufactured. It requires more energy to manufacture it than you get by using it in a fuel cell or by burning it. Further, it must be transported AND fueled as liquid or under very high pressure (dangerous). Fueling a hydrogen vehicle is typically done using high pressure gas and a special nozzle to handle it. Unfortunately, discharging high pressure gas into the fuel tank causes temperatures to drop at the nozzle, actually freezing the nozzle to the car! It can take up to a half hour to unstick the nozzle after fuel flow has stopped. The means others waiting for the fuel pump have to wait a long time until you can clear the pump.
A breach in the fuel tank is extraordinarily dangerous. Unlike gasoline, which typically just spills and maybe surface burns, hydrogen tanks are under very high pressure and can cause the whole car to accelerate out of control even if no explosion occurs, or the tank itself to rocket away from the car and hitting who knows what! An explosion is also fairly likely. Hydrogen gas floats up, and a significant and dangerous cloud of it will accompany any breach.
Fuel cells are not instant power. They take a significant amount of time to 'spin up' to produce the necessary power. This is even worse than steam driven cars had. To compensate, a large battery pack is used to bridge power across the gap. This of course means you have the problems of hydrogen PLUS the problems of an EV all rolled into one car!
No, the hydrogen fueled car is no better than an EV.
While crude oil (and gasoline) can be manufactured, it is cheaper simply to drill for it. This is a renewable fuel. The Earth is a giant Fischer-Tropsche reactor. Anywhere you care to drill for oil, you'll find it. It is nearest the surface at the edges of tectonic plates, particular where spreading action is taking place. This is where major oil fields tend to be located as well. The ONLY reason fuel is so costly now is due to artificial restrictions (many by Democrats), and inflation (caused by FDR, a Democrat).