But using any mode disables the achievements, right? If there were a few more built-in items, then that would not be a problem.
For instance, the USA DLC should have built-in American style signals, roads and road crossings. For me to play with realistic American roads, wayside signals, crossing signals, etc., I need to install modes. Shouldn’t this all be part of the USA DLC? Why is there a European road crossing sign in the USA DLC? Why aren’t there American style crossing gates and overhead flashers? That would make sense.