There are rare times when 100 mph might be appropriate, such as a road rage idiot with gun, intent on you being the target. That's not often that happens. Young adults tend to think they are bullet proof, they want know how fast the vehicle will go without considerations. Drunks are a problem as well when it comes to driving, not to mention cell phones.
Mostly I am grateful for cruise control. I can get on the interstate, set it, and forget about my speed and just concentrate on driving. There will always be those who want to go faster. In ways on the interstate I love to see that. It means the next cop stop won't be me. I don't need to run along behind them to watch the action, I'm quite content to arrive on the scene long after the stop has occurred.
Still we have the high speed hazard here. It comes from the coyotes (the name given those smuggling in illegals) and they often get in high speed chases locally. The last one that was close to me occurred a couple of months ago. The highway patrol put out the tire spikes downtown. The coyote drove another few blocks and they all bailed not two blocks from my home. That's not to say how many others have passed on by and not be close to me. That happens near every week or so. Some wind up wrapped around trees, some wind up going in people's houses, vehicle and all before they bail. The last one that happened last week, involved a high speed chase, on a two lane, where the coyote lost control of his SUV and headoned another. 8 people died in a fiery crash.
Mostly vehicles today are speed limited. If you just got to race, it requires you buying a special chip that allows the motor to rev higher. Honestly, I'm happy to see that. While it won't prevent you from breaking the speed limit, it will prevent you from doing a flat foot on the throttle speed run at higher speeds. Still there is no substitute for driver experience and caution on the road.