Oh, so everything electric is "voltage" and voltage is everything. An 80V string trimmer is twice as good as a 40v string trimmer because "voltage". Got it. 9.6v cordless tools displaced by superior 12v tools. 12v displaced by 14.4v. 14.4v displaced by 18v. 18v displaced by 20v... If only we had a Government Bureaucrat to dictate The Correct Solution from the start! Typical quality of public education under the influence of marketing.
You also skipped right over my disdain for government picking winners and losers because obviously you are supporting a government lead. "Because 920 is bigger than 800 is bigger than 400, I by the power of my superior reasoning declare government funding shall only back charging solutions using 920 volts or greater." Never mind what works. If one is to dictate a standard why not just say 2000v right now?
Reduction in charging time? You are not a student of what Tesla has done the past 13 years. My Model Y Supercharges about 4x faster than my 2013 Model S did. A friend's Model S charges about twice as fast as my Model Y. She can drive 700 miles stopping for a total of 30 minutes. Most of us spend more time on biological functions than that.