Well, that is what I am going to find out. I tend to drive like an old farmer and 55 is my usual upper limit. Sometimes sixty. My wife recently asked me whether I have claustrophbia in way of commenting on the large distance I keep between myself and other cars on the highway. I don’t, I used to spelunk.
I drive a lot of miles every year so the ease of working on the bike is of paramount interest.
You might want to look into the 1980s Honda Nighthawks, then. Honda poured a lot of money into making them low-maintenance and high-reliability. The 250 and 450 are straightforward conventional bikes with chain drives, the 550, 650 and 700S are all shaft-driven so little to no maintenance there. They all have hydraulic valve adjusters, so no maintenance there. They all have electronic ignitions, proven reliable over time, so no maintenance there (points suck.) Pretty much just gas them up and change the fluids at the prescribed intervals and they’ll go forever. The 700S (my bike) is the sport model of the range, the others have significantly less power. All are air cooled, and the smaller ones are decent starter bikes.
I’d suggest a Nighthawk 550 as a starter, if you intend to ride a lot. Maintaining a chain is a PITA, even if you get an automatic chain oiler.