First, what little time we get for vacation (the only time most of us would go the distances where we'd need to charge mid-trip), those charge times are eating into our vacation time. We want to spend that time at our destination, not sitting around waiting hours for a charge.
I vacation around the US in an EV all the time, and it's really not an issue. Not unless your vacation travel is of the "pee-in-a-bottle-no-stopping" sort. If you aren't hardcore about minimizing travel time, making stops for decent meals, and stops for bathroom breaks and leg stretching, you'll find that you spend little if any time waiting for the car to charge. What you do is drive for 2-3 hours, then stop for 15 minutes for bathroom (and charging), then drive for 2-3 hours, then stop for an hour for lunch (and charging), then drive for 2-3 hours, then stop for 15 minutes for bathroom (and charging), then drive for 2-3 hours, then stop for an hour for dinner (and charging), then drive for 2-3 hours, then stop for the night (and charging).
Basically, you just make sure that whenever you stop for biological needs, you do in a place you can plug in. This is quite easy to do.
You do want to pick hotels with chargers to overnight. If you don't, then you'll probably have to 30-45 minutes in the morning to charge (during breakfast?).
I've done several thousand miles of road trips with an EV in the western US, where distances are long and cities are far apart. It works fine.
You can go 200 miles sometimes without seeing a gas station, let alone any kind of EV charger setup.
You actually can't in the US, not on the interstates, anyway. Tesla has the US interstates covered, with chargers every ~75 miles. Sometimes this means there's a Supercharger out in the middle of the desert, sure. There's always a gas station/convenience store there, too. Also, you don't actually have to think about when/where you're going to charge. The car's navigation system tells you where you need to stop and for how long.
If you get off the Interstates, you can find larger distances between L3 chargers. In practice I've never found it to be a problem, though.