Imagine a USB-C compliant version of MagSafe. That would be awesome. not sure if the physics work out (can you efficiently push that many bits through a magnet like that?)
Yes, I have a magnetic adapter which works very well. Apple could integrate the magnetic ports on both sides and still have 4 usb c ports (which you could still charge the MacBook with).
For data transfer or just charging? I’m sure they work for charging but I think the questioner was wondering if you could actually run 10Gbps through the magnetic adapter.