Yes, a laser scanned track is only valid in one point of time. The time it got scanned. (For me that is good enough). After that time the real track changes every year. So it is important to know when the track got scanned. But at least you can discuss with people or do some research what got changed after scanning (like repavement of parts of the track). It is generally a bad idea to think you can drive the real Nordschleife fast in real life cause you have driven it so often on a simulation + laser scanned track. You will wreck your car. But I think you are a lot quicker learning the track.