[Taylor95]

Most of those things don't make a difference to the average consumer. And people generally don't buy vehicles that run off of CNG unless they know a few things about the car. Imagine having several different kinds of batteries in EVs. They all charge the same. How will people even know what kind of battery their car uses? This is important because some won't do as well in temperature extremes and may have different optimal charging conditions. Some may take longer to charge as well. That is a lot of information people should know. On a diesel truck, the gas cap says "diesel fuel only", and people still mess that up. Having different battery types will probably accelerate wear because people won't know how to properly use and care for them.

You mention that nickel batteries don't charge fast. What if someone routinely hooked up their car to a Tesla supercharger? Would there be built in protection?