I can understand the desire to go faster, truckers do it all the time. Those long stretches for hours on end use to be killers when the limit was 55 mph. That said, a few things taught me to slow down.
I didn't know anything on our first trip so we ran 75-80 mph with traffic. The only thing that bothered me was the MPG. We used less than half as much gas on the way home.
Another is micro burst. Everyone knows to slow down in the wind but here you can get hit so hard out of the blue that big rig or little, you are going to be moved. The worst ones will push you off the road or even tip you over. I don't want to be doing 80 when it happens. Even at 65 we almost pushed a patrol car running next to us off the road. The best I could do was hold us at about a half a lane change. I thought the guy a head of me was going to lose it because he completely changed lanes and then over corrected trying to get back over. After that the patrol car stayed in the open space between the rigs.
That same trip we were doing 65 and being passed by a pick up pulling a ATV trailer. As he cleared our nose I let up on the gas to make sure he didn't cut me off. Good thing too because we saw a puff of smoke off the right trailer tire and I really started slowing us down. For the first second or so the trailer just ran rough, then as the blown tire shredded it stated bouncing on the right and swaying a bit. By the time he cut across us and on to the shoulder the tail was wagging the dog pretty good.
So yes we can do the higher speeds, it is just what happens when the chit hits the fan and it doesn't have to be my chit either. Be safe out there.
