Transportation hardware has one thing in common that no other vertical shares: it lives in a vehicle and gets used standing up, outdoors, often in one hand. Everything about specification follows from that.
A device chosen for a warehouse assumes mains power, a roof and a floor to stand on. A device chosen for a route assumes none of those. It has to charge from the vehicle, survive weather at every drop, stay readable in direct sunlight, and keep working through areas with no cellular coverage at all.
Printing is where this bites hardest. A proof of delivery is a receipt, but a manifest or bill of lading is a full page, and those are two different printers. Trying to serve both with one device is the most common compromise, and it usually means folding a legal document down to three inches.
If the driver has to put something down to use it, it will eventually be left behind.