My guess it that the way this will go is that the governments/EPA will pressure the auto manufactures to ensure that their approved emission and safety specifications are kept in tact. If a manufacturer gets fined for having their cars modified you can see them having update capabilities to the ECU or other in car computers. You can do your boot mod to the ECU but the manufacturer will spot that and over ride it to factory spec to stay in compliance with emission standards. We are headed to a time of automotive fascism. My 2020 M4CS in the garage gets more beautiful everyday.
This speed limiting is not the end of the story. You think the ASS (Auto Start Stop) pisses you off wait for the "Kill Switch"
Kill-Switch Rule Under Consideration
Section 24220 of the 2021 infrastructure law directs the National Highway Traffic Safety Administration (NHTSA) to require that automakers include a device in new cars that will passively detect whether the driver is drunk and keep them from operating the car.
NHTSA has until November of this year to write the rule and then new cars made beginning two years after that must comply. The law specifically states that if NHTSA can’t find a device that will accomplish this, then it doesn’t have to require one.
https://ti.org/antiplanner/?p=21940