My concern is stiffer cables are likely more likely to rip USB ports off the PCB. A lot of devices provide very little support to the USB port which is basically just hanging off pads on the PCB, so a stuff heavy cable could provide a lot more bending force to rip it off.

Phones and macbooks have it done right where the outer portion of the port is built in to the device body, but most other devices don't do this.