> With cars, the current model most states in the US have is a good middle ground. You can do whatever you want to your car, but it needs to pass a safety inspection every 2 years to drive it legally.

Only 4 US states have biannual safety inspections. Another 11 have annual inspections. The other 35 states + DC do not have safety inspections.

https://en.wikipedia.org/wiki/Vehicle_inspection_in_the_Unit...