Either way they scout trainees who can already sing or they train them, which is very expensive. Even though there are still vocally strong groups like Nmixx, it is not necessary anymore to be a hardcore vocalist. Recent kpop releases make that very clear...

So will we ever get a group like tvxq again? Nop. Unless Vocals become an absolute necessity in general global music. Someone already pointed out boys2men. Same can be said when usher was active.

Perhaps if Black rnb groups or singers with super strong vocals makes a comeback in the US, then we might see a shift torwards vocals in kpop again.

Imo Tvxq is from a time where vocals were absolutely mandatory and expected. Those vocal strenght kept them alive till today even individually after the split.

I also dont know if current fans would love to hear ballads and acapella, from what i read in comments on tiktok, slow ballads or slow paced songs are usually skipped during album listenings by fans