Not really. It's a very manual task. Can only be scaled if you ship thousand units of the same model to a single factory. Compatibility has to be evaluated per model. Structural integrity has to be preserved, batteries are usually located at different spots than motors are.

Of course you can say "here are 4 pros - if you say anything bad you want the world to suffer from cars" but you know that this is not how we can get to a solution.