But did you know that one of the cases PDF is being considered (and, based on Internet rumors, is already being used) is as an interchange format for CAD drawin

But did you know that one of the cases PDF is being considered (and, based on Internet rumors, is already being used) is as an interchange format for CAD drawings? Now it suddenly starts mattering. Not really? It's considered as an interchange format, not as the interchange format. If you have CAD/CAM work for parts that need precision machining measured in tenths or less, you're not using machines that accept PDF to begin with.