Here's why the new one looks so weird.

https://www.msn.com/en-us/autos/enthusiasts/here-s-why-the-new-usps-mail-trucks-look-so-weird/ar-BB1dYQsg?ocid=msedgntp

Actually, delivery vans are a better application of electric vehicles than taxi cabs, since much of the cab fleet operates 24 hours/day. A slow charge is better for the batteries.