The difference is (as long as its not self-driving) EVs are stupidly simple devices. They have less technology than smart phones. It would be great to have regulation to force standardization and open-source firmware, but genuinely we already have plenty of software and controllers capable of fully handling any EV, VESC being the most popular example of this.

And yes that controller both handles electric aircraft and RC cars. Because EVs don’t really differ from the model scale to the extremely large scale.