Thanks for your finding on Indiegogo, I also backed some interesting projects there in the past. Such a multi magnetic cable isn’t new to me as I’m already using them since a few years.
What’s to find out by me is how a magnetic cable matches with usb-c headphones. It would require to have the charge & data cable with compatible magnet plug to the used usb-c headset type. I couldn’t find anything that looks matching.
Otherwise I would have to unplug for attaching usb-c headphones and then again insert the magnetic plug for the compatible charge cable. This would not decrease any wear on the socket.
Something similar to this universal magnetic adapter with usb-c tip would just be fine.