I was not aware that this type of kick was used in any other styles other than Muy Thai.
Those who know and practice it will agree that it can be devastating when down correctly.
In fairness to everyone I'm not condemming those who perform the standard roundhouse kick with the ball of the foot. I still would use this kick as well for specific targets. For knockdown rib breaking, stance busting effectiveness is hard to beat the Muy Thai roundhouse.