Even if you are entirely in Revit, you can never truly leave AutoCAD behind. With surveys and civil still in AutoCAD, it is important to maintain certain workflows so that you can share your landscape seamlessly.
The world in Revit is entirely different than AutoCAD. It doesn’t like your project/project base point to be larger/outside 20 miles. Unlike in AutoCAD, your project should never be way off in space from the project base point (origin) [You can still do it, but Revit will warn you of errors, and certain things like hatch patterns will misbehave, so I wouldn’t recommend it].