Any car in the EU that is changed after certification needs to be recertified or have the update tested. The day Tesla updates something that causes someone to get hurt Tesla will be sued into the ground as all software updated cars that haven't had their update tested are illegal. It is also illegal to change a car to make more HP (there's a limit, AFAICR it is at 5%) without getting it recertified. While Tesla don't give a f... about legality some (like me) have been through the process of recertification on way less changes than Tesla does. It is both time-consuming and expensive and the testing was insane. It baffels the mind that none of Tesla's competitors has cried foul yet.