Plan B I guess.
Plan C might be like one of the battery jumpers that don't need a separate battery to jump start with but do need recharging. That's extra weight though and will affect range just like a little generator and gas to run it.
An all-electric vehicle with a portable gas generator in the trunk just doesn't make sense. A hybrid is a much more practical alternative.
the next question is- are all electric cars going to be tiny bread boxes? I loved our old cadillac loads of leg room- can even sleep comfortably in it- it’s an old boat of a car and was like sitting in a sofa when driving any where- I don’t see electric cars being that plush and comfortable