Originally Posted by
alanjed
USB-C is not just a max amperage issue, it can also supply different voltages. There is a handshake between the power controller and the device to determine the voltage and current to be supplied. This makes the USC-C port electronics much more complicated.
The good news is UA has a reference design for it and it is in production!
Just not in all rows or all newly delivered aircraft. That will be a regret within 3 years.
Dyce makes an excellent point Re EU - once iPhones toggle to C it’s game over.