[mtrimpe]

I think we should start thinking in battery cargo trailers. When do you want extra range and battery? When you're going on holiday. What do you want apart from extra range when you're going on holiday? Extra storage space!

So why not just start selling battery cargo trailers which can provide your main car with extended range when needed?

It's also much easier to swap and rent out physically, financially and emotionally than your main car.

[quesera]

Most drivers can't handle trailers. The roads would be so much more dangerous if trailers were commonplace.

Trailer hookups can be legitimately difficult. Even in the simplest case, they can be time-consuming.

Humans are notoriously bad at backing up with a trailer attached.

Heavy trailers (batteries) are extra dangerous -- tail-wagging can be scary!

Cars with trailers don't fit in parking spaces.

...

A replaceable battery has to be in the underpan of a car. Or split across several battery modules, but keeping the center of gravity low, and between the axles.

[tln]

This makes a lot of sense, except that driving with a trailer isn't very enjoyable. I bet the aerodynamics would suffer too