[Eater_of_food]

Presumably, sticking with USB lowers costs. Just buy mass-produced ports rather than invest in tooling to build a bespoke port.

[pathartl]

They already produce custom designed ports in order to add some tolerance to make it easier to dock the device.

[tzs]

The choices aren’t limited to USB or bespoke. There are thousands of mass produced non-USB connectors available at any major electronics parts distributor.