Take, for instance, the analysis by Korean vocal trainers from DS Music Academy: when analyzing Bambi (and also UN Village) they highlight his micro-control, the subtle variations in every verse, his breath management and the massive amount of practice required to achieve that level of ease and tonal variety. They explicitly state that singing like this requires extensive, high-level training. They also pointed out how a song like Bambi normally leaves a singer completely breathless, yet Baekhyun delivers it effortlessly… even while executing complex, physically demanding choreography and transitioning straight into songs like Cry for Love and All I Got without ever showing the strain such a setlist entails. Many vocal coaches frequently highlight his smooth transitions and light mix, which sound effortless but require precise vocal cord closure and control, as well as subtle dynamic and tonal variations that demand years of practice to sound natural. Essentially, that overall sense of “ease” is the hardest part to replicate.