I'd be terrified if we allow them to go really fast. They have software and sensor faults, the Teslas are just regular teslas without redundant hardware. They don't have extra sensors, they don't have two sets of their HW4 hardware. If there is a fault the driver has to immediately take over. They can't handle rain well, snow etc. FSD is interesting but it's not nearly ready to be a near fulltime driver. Waymo is much more advanced and experienced but I don't want to see them driving at high speeds. Maybe after 10 years of exp with reundant hardware and software.

You're talking about long highway trips? Parent is probably talking local trips, where 200+ mph is never going to be safe, and would not even be useful.

Reminds me of the .gif floating around years ago showing an intersection with cars blowing through it in both directions while very intentionally just missing other cars.

Speed doesn't matter at all in city driving on regular roads. Going from 35mph to 25mph doesn't materially affect the trip time.

Think about SF, its size is (famously) around 7 by 7 miles. So it'd take 12 minutes to cross (as the bird flies) from one side to another at 35 mph and 17 minutes at 25mph. Which is completely unrealistic, because real travel times are dominated by traffic lights and congestion.

This calculation changes only when we're talking about long-distance travel on freeways. But honestly, I expect that fast long-distance trains with seamless transfer to self-driving taxis would be a better idea.