You're supposed to buy a second car just for long trips? Even if you live in a dense city, America is inescapably huge and requires highway travel unless you never want to leave your neighborhood. We don't have a functioning passenger rail network like China etc.
Even if this were remotely feasible, which it's not, this kind of tiny car is a total death trap for your family when everyone else is driving large vehicles. I would love to see a crash test video of this against an F-150.
Finally, let's say you do live in a city and you are already a two car household. Try telling your wife that she has to buy this ugly toy-sized car that she looks ridiculous in while you get to drive a Tesla or Rivian. Like it or not, cars are lifestyle status symbols where the aesthetics matter.