Just realized how many Kpop groups have changed lineup

Quote from Yumeku

by adding members

The thing came to my mind while I was thinking NCT adding members, then it occurred to me how many popular groups changed lineup:

Brave girls

Dream catcher

Momoland

Red velvet

Aoa

Even 2nd gen

T-ara

After school

Wonder girls

Kara

Super junior

There’s many more but these are the ones I thought of right away.

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momoland changed their lineup?

Quote from alexS

And if you mean Daisy and Taeha, the debut album doesn't count btw.

Why wouldn't it count? It seems to me like Momoland debuted as a seven-member group, and added two members later on.

Traxx and SG Wannabe too but they're not idols

well the question would then be did the lineup change benefit or affect the group positively compared to negatively