The road maintenance part is important, I agree. Not too bad here in Arizona, mostly, but there are still some rough spots here and there. I just go with the speed of the surrounding traffic, and avoid the bad pavement once I know where it is.
Never have driven in Germany, though I’ve ridden as a passenger on the Autobahn.
I was on the section from Innsbruck, Austria going south to Italy. I had a guy pass me in a Mercedes like I was standing still.
It reminded me of when they take a normal car around Daytona Speedway going 65 mph. Then have a NASCAR pass them going 150+. It looks like they were standing still.