Vans appear to be slightly more expensive but not outrageously so (and honestly it's not at all uncommon to get a free upgrade when you book the economy car).
As for insurance, why would our hypothetical family need to get insurance? Surely they already have it, if they have a car that they drive.
I'll grant you that insurance isn't necessary (or even advisable), however plenty of people feel more secure getting the (very expensive) protection given the risk of driving an unfamiliar car to likely unfamiliar locations.
Still, glad to see prices coming down. I paid $80/day for 3 days in June and $75 (after a discount) in July.
(It's outside my risk tolerance to reserve an economy car and gamble that I will arrive at the airport to be delighted by a complementary upgrade to a vehicle large enough to transport my party.)
Tech folks can make this argument, but it's a well-studied phenomenon that technologies have trouble gaining wide adoption until they are seen as credible replacements for existing usage patterns. Can either seek to convince millions of people to change their behavior (and show them why) or improve the product to better fit existing patterns. Which is easier depends on the characteristics of the product category.
My take is EVs are so similar to ICE vehicles that they will have to fairly closely approximate ICE capabilities to get to (say) 50% penetration. And that likely means they will need to support the fairly common (in America) use case of driving a half day (4-5 hours) in the hot summer, laden with weight, without adding too much drama for charging.
It's not the frequency, it's the notion that one will have purchased a "bad" vehicle. Here, "bad" means that you need to rent another car[1] in order to go on a road trip. People buy cars for convenience, and renting a car to use instead of the car you own is not convenient. It's not odd to expect a new car to be as functional as one's current car over the course of a single year.
1 - The last time I rented a vehicle for a road trip (we had an extra guest, so wouldn't fit in my car), the total cost was ~$1,000. If we needed to rent a car twice in a year due to owning a range-limited EV, that would effectively add ~$167/mo to the cost of ownership of the EV.