Well, that's funny, because I live in Boise, and there have been routes out of Boise that were enabled for several years by very high amp wall connectors that required the high power onboard charger. Going through eastern Oregon to Bend, and going southwest to Winnemucca were both like that.
That's because of an infrastructure difference. Europe has very common three phase electricity available in a lot of places. With three phase, you can deliver a lot more power for the same thickness of cabling and wire runs to the charging locations (cost issues). That is a nice advantage there.
Same thing in north central Washington. If you want to take highways 2, 20 or 97, 80-amp L2 makes it possible.