OS-upgrade via data cable?

[Hlib]

I`m a little surprised that neither CASIO nor HP have yet made the process of transferring OS from one calculator to another as simple as TI done 20 years ago.
I`ve had a case where it came in very handy. One of my TI-83+ from the first release had old hardware but with the latest OS version (1.17) installed on it. I also had a TI-83+SE with the newest hardware and circuitry, produced in 2003. I damaged the firmware with my wrong actions in this TI-83+SE, and the device permanently gave out any garbage on the display. Using a simple procedure from the official instructions, I switched TI-83+SE to the OS ERROR mode and successfully updated the firmware using the old TI-83+ and 3-pin cable.
Undoubtedly, the most convenient way to update the OS was in the HP-50G using an SD card. We are bit missing the support for SD and external storage devices in HP-Prime.