The USA seems to suffer from a not-invented-here problem when it comes to automotive regulations. Most of the world adopted the European standard for adaptive headlights, but the USA had to spend years coming up with its own incompatible standard.
It's not a bug, it's a feature? US manufacturers are not widely known for technological innovations. Deviating standards are a way to keep them competitive in their domestic market.
There is a reason US school buses look like WW2 troop transport and the long haul trucks are museum pieces in all aspects. It's not even NIH, it's just protectionism.
