In full agreement with you both, RS & CC. This procedure's a mechanical one, aided by heat, which 'burns' the metal in a way that reduces or eliminates its resistance to corrosion. It does eliminate the need for something extra to hold the wire ends together, unless you include the needed heater in that category, and isn't something I'd want to be prepared to do while out on a ride somewhere. Where corrosion may become an issue with cables on bikes depends so much on conditions of use and maintenance it's got to be a personal choice whether to use it or not; limited to the very ends of cables exposed to the elements, to my mind doesn't preclude using it for my needs.