If I'm doing Boston -> DC via Tesla Model 3 Long Range, it'll add two stops for 20 minutes and 25 minutes. However, I'm going to have to stop for gas along the way at least once so the 45 minute penalty should maybe be a 30 minute penalty. Realistically, it isn't a bad thing to stop a couple times, get drinks/snacks, stretch my legs, etc. It feels like it's a 5% penalty which just doesn't seem significant for something people rarely do.
I think some of it is the psychology that a 20 minute stop feels like a real stop while a 5 minute stop doesn't feel like a real stop. Even if you spend 10 minutes in the convenience shop or get lunch, that's your "choice" rather than the car's need. A lot of gas stops are longer than 5 minutes on road trips.
I think people buy cars for things they almost never do - and have a weird hate of themselves if their car can't accommodate something. I had a friend whose car couldn't fit a piece of furniture and he had to pay $100 to have it delivered. He said that he hated himself for not buying the larger (and $5,000 more expensive) vehicle he was also considering the three times this had happened. In my mind, that's not something to regret. You've come out $4,700 ahead! Yes, sometimes your car won't accommodate everything and that's ok. Maybe your car will need 5% more time to do Boston to DC, but that's not a big deal in your life.