Earlier quoted context omitted.
Tesla's are already very close to that right now. I used to drive from Florida to Pennsylvania fairly often, and in my model 3 it's a rough cadence of drive for 2.5 to 3 hours, stop at a supercharger for under 30 minutes, repeat until I'm there. And that's with the vast majority of the trip at 75mph/120km/h. It does get worse in the winter though, I need to stop more frequently like every 2 hours, and for more like 3…
I think discussions of range alone are misguided for this reason. The state of charging infrastructure is just as important as the range of the car itself. The 300 mile range on a tesla is fine even for long road trips because the infrastructure is solid.
And this is why I facepalm every single time I see a car manufacturer trying to make a "Tesla competitor" by focusing on getting most of the range with none of the charging infrastructure. (Or they assume the infrastructure is someone else's problem, that can be solved with some press releases about business agreements.)