It's a reasonable amount of time to stop for lunch, though. Since these things are primarily going to be charged at home, you'll almost always be starting long trips with a full charge, and 4-5 hours is more than most people want to drive before taking a break anyway.
Taking a break generally means getting out, stretching your legs, taking a piss, perhaps drinking a cup of coffee, not settling in for a full 3 course lunch.
