If there are people in the middle lane and you blast past them at double their speed, that could be seen as unsafe

First comes the Porsche, who then gets bullied off the left lane by a Lamborghini, who then gets bullied off the left lane by an Audi RS6.

That’s Germany

You can totally go 250km/h on the A5 from Frankfurt to Darmstadt, if traffic allows it. That wont always be possible, but typically if it isnt during work traffic, 160-200km/h is doable comfortably, even on other parts of the Autobahn

The longest unrestricted part that ive driven should be the A71, where you can go longer passages without restrictions, save for the tunnels.