This feature already exists on the USB-C MacBook charger. I'm sure it'll be years before the whole line is updated, but I don't see they wouldn't. USB-C can car

This feature already exists on the USB-C MacBook charger. I'm sure it'll be years before the whole line is updated, but I don't see they wouldn't. USB-C can carry up to 100 watts -- the biggest MacBook Pro MagSafe adapter is only 85 watts.