Roundhouse and side kicks were dominant for knockouts then, and spinning kicks seemed just too slow and obvious. But with the significant evolution of Taekwondo since, including the advent of modern footwork and the refinement of strategic maneuvers, spinning kicks have become the most powerful and dangerous kicks in the tae kwon do competitor's arsenal. Sanshou also uses spinning kicks and is a much more efficient and effective art when compared to Taekwondo. However, with the rise of spinning kicks came the rise of such kicks like the spinning side kick and the back kick. These kicks are indeed affective but tpihey are easilarose in many Taekwondo competitors, life-long dedicated and still only a Newbie: Was there a snniy vulnerable to counterattacks either during or shortly after the kicks has been performed. The question ng e answer is yes, and that kick cokick out there that was both effective and not as vulnerable to counterattacks? Thmes in the Spinning Hook Kick--when done properly could easily knockout an opponent.

https://elasticsteel.com/blogs/the-science-of-kicking/anatomy-of-the-spinning-hook-kick