Fair that I can't say you should never do so. I'd stand by it as a general safe rule, though? If the road is that long and straight, I'd imagine it also has a rather high base speed limit already.
Definitely on a twisty and/or hilly road you don’t want to pass if you can see above or around. But there are lots of places in the country where you pass if you can see the oncoming cars are far enough away. And you are usually passing a truck or RV going 40 so it’s not that hard.
However, I’m so glad I live in an urban area now where such driving skills aren’t really needed much anymore. I’d defer to people living in rural areas that do this many times a day.
Agreed that it can be subjective and can/does happen often. I further agree with you that you are most often to want to pass if someone is doing 40 and the limit is 50+. In those cases, we wouldn't be in the scenario offered in this thread, as you often don't even have to speed to execute that pass.
That said, I underline again that I think a system that impacts throttle at merely 1 over the limit would be a bad idea.
However, I’m so glad I live in an urban area now where such driving skills aren’t really needed much anymore. I’d defer to people living in rural areas that do this many times a day.