One thing people seem to miss out, it isn't just the 10-lane that makes the autobahns so good. One of the main drawbacks of the British motorways is driver skill and attitude which are far behind that of the Germans. Plenty of selfish drivers who hog the outside lane and plenty who pull out without looking. Much better than the French obviously but still a long way to go in terms of lane discipline when compared to the Germans. One thing for sure, the 70MPH speed limit together with it being a fairly affluent country where majority of cars sold tend to be fairly sturdy does help significantly as most new cars generally can be involved in a crash on a motorway without occupants being seriously injured.
As for me, one reason why I have a Tesla is none other than Norway has very low speed limits and it is strictly enforced with very high penalties. The Tesla makes perfect sense because the faster you go then immediately you see your range reduce by a significant amount and there is a big noticeable difference when you do 90kph vs doing 110kph. Therefore as "refueling" does take time if I'm not within a supercharger I don't really do beyond 90kph or 100kph, one thing for sure if ever they change the speed limits I must find a way to get rid of the tyre noise which can be annoying at higher speeds. I generally drive quite well when in Norway and for the most part very well mannered. Somehow or rather the moment I get behind the wheel of my LR Discovery in England I tend to forget the 70MPH speed limit and usually do 80-100MPH where it is safe to do so.
If UK had an autobahn with no speed limits, believe it or not when motorways were first built in UK there was actually no speed limits to it at all. I probably would do 110MPH as I don't believe doing any faster changes anything for me and driving a Land Rover does come with quite a few downsides chief among which is stopping distances isn't that great and there does seem to be quite a lot of wind noises once you hit 90MPH. The other issue is the tyres for it isn't really the type for doing high speed.