I do think it would suck but it would be sensible to have electronic limits that cap at something very high such as 90mph.
It's better than nothing and no one should ever go at that speed anyway.
It's better than nothing and no one should ever go at that speed anyway.
More seriously: Almost all cars in Germany are limited to 250km/h (155 mph). Higher limits for more powerful cars are also found in the 280-290 km/h (173-180 mph) range.
So, de facto, even in Germany speed limiters have been a thing for decades. The discussion should thus be more about the limit, rather than the device itself.
Obviously this is different than imposing a „+10 mph“ limit, since the car would have to know the speed limit of the current road.
As a German, I have to fiercely object to people fiercely objecting here. I would enjoy German highways way more, if there was a sensible speed limit just like there is in the rest of the world. Also, I think the police should start going after people who don't keep safe distances (as a function of the speed they're going) and pressing criminal charges for intimidation.
Most cars do have electronic speed limiters today, which are often set to values that reflect the mechanical limitations of the vehicle (e.g. the designed speed rating on the factory equipped tires, etc)