Traveling USA coast to coast a Kia spent about 7 hours of travel time charging whereas a Tesla in an earlier trip spent about 12 hours. Whether this means chargers have gotten faster or cars are charging faster or something else is hard to tell.
800V allows cheaper cabling, but that has nothing to do with the charging rate of the battery cells.
As people switch to EVs range anxiety is a big thing, but once I became an owner I realized charge curve mattered way more than static range. I’d rather dump charge in at low state of charge and make a couple more short stops than sit around waiting to get to 80+% as the curve tapers.
Higher voltage also reduces power losses.
Not sure what you are arguing against here, to be honest - are you defending Tesla‘s system? Slow charging is one of the main arguments against EVs, it’s great that this is finally being fixed.
It was a Model S P85D in 2015!
Here's the original source, FWIW. InsideEVs basically dug around to find something comparable and called it a "record": https://insideevs.com/news/548679/kia-ev6-charging-record-us...
I'd vote for "something else" since the old trip took 2.4 days (~90 km/h on average) while the new one took 7 days (~27 km/h on average).