i get the feeling you only asked this to use the phrase "dragon sweep". It uses the most energy for the result of any kick stopping technique, and you can't even capitalise on it's effect (grounding opponent) in american kickboxing. ontop of that if you actually watch footage of real dragon sweeps being done, it seems to be like a 50/50 chance your opponent lands on you, half falls and recovers, etc, making it a very risky move for MMA also.
conclusion: should only be used by cardio machines and actual dragons.