Exactly. I often stay in the left lane when going very fast, to leave one empty lane between me and others going much slower. I will not go 200 km/h next to a truck or a car with a trailer going 90, as that is just not safe. If there is a car in the lane next to me, I slow down before I come close. If there are multiple cars, I slow down even more, as somebody might decide to overtake and come into my lane. And if I see somebody faster behind me, I pull over and let them pass.

The only time I really speed up, is if there is a lot of space all around, on a straight road with good visibility and road conditions, which is quite rare. So most of the time the autobahn just feels like a regular highway, with a bit more flexibility.