Other charging options are allowed, it's just that there should _also_ be a USB-C option.
In which case I wholeheartedly approve.
That's a nice loophole there :)
Anyway, it's not like USB-C isn't good enough and that they can't change the rules if/when a new connector get enough support. And to get enough support, it most likely means that it has to be compatible (in some way) with USB-C. That's a nice feature.
Maybe, but will it be so small to make two ports cumbersome? Doubtful imo