Modular batteries would be a possible solution, although likely to not be feasible.

If car batteries followed some size and power standards like AA and AAA batteries do, different models could have a differing number of batteries that could be swapped out addressing the different needs for different models situation. All that would require is the majority of manufacturers to comply with the standards in a consistent way, and since we can’t even settle on a standard charging connector the standardized batteries are not really feasible.