Factors for delayed or no deployment in the US include:

- lack of US standards for the feature
- lack of American understanding of the feature. Who pays to educate the public?
- competing features under development by US manufacturers
- manufacturer liability vs US laws

Some of it is the grass is greener syndrome. People complain that US cell phone coverage isn't as good as in Europe. Part of that is because in most of Europe the government mandates where cell phone towers should be to ensure coverage. In the US there is often local, environmental and political resistance to new cell phone towers. Maybe trunk triangles blind the endangered yellow bellied sapsucker.

Sixto
87 300D