What a beast! However, if the postal service chose this over other ebikes with a trailer, then one can understand why they have budget problems. What happens if/when it runs out of juice? Wouldn't want to have to push that baby home . Actually, I think it has great potential for EMS folks working in big crowds, like concerts or public events or other rescue workers trying to access someone in difficult terrain.
It's a nice concept. There are certainly three wheeled electric bikes, and they would allow the use of pedals. This is a bit heavy. I've researched mobility scooters, and some are quite husky. Many retirement communities feature golf cart type vehicles. I'm sorry there isn't more 'in between' electric stuff. I still love the Aptera.