a 400-600 mile drive is not unusual? it's not unheard of, it's not out of the question, it's not a crazy distance for cities to be "away from" each other, but unless your job is "driver", it is not a "usual" thing to do except a few times a year. You're talking about a full day driving.
Yeah, "it happens a coupe of times per year, as opposed to a commute that I do multiple times a week" is stretching the definition of "usual" to breaking point.
In context though, it was about "how many charging bays do we really need, if some or many cars don't need to charge en route, or need it much less often?" so the semantic argument around "what does 'usual' even mean?" is a ridiculous distraction. These long trips of course exist but are not the largest percentage of cars on the road.
