Aside from TVXQ and 2am (2nd gen) where all members were main vocals, and Suju/exo/btob powerful vocals when they were active as full groups, I can only think of nct 127 as another group with a strong vocal line. They officially have 4 main vocals (taeil, haechan, doyoung and jaehyun) and 1 lead vocal (jungwoo) with another member having the potential to be a lead (yuta). So 6 out of 9 members are vocalists.
Now there seems to be a lack of vocal lines among active boygroups, most of the time it consists of only 1 or 2 members that aren't main-vocal-worthy tbh. And I missing more groups or is there a real lack of vocalists in recent times?
So are nct 127 with their 4 main vocals and 1(2) lead vocals the norm or the rarity? Was it common in previous generations and 4th gen just changed everything ?