Which GG do you think is the safest for the long run ?
I have the feeling that the cute/innocent gnd concept works well as long as the members are still very young, you can’t do it forever, they seem to have it the hardest when they switch to another concept. Almost any GG who got popular with that concept lost quite a lot of their popularity when they switched to a more matured concept. Apink is the only GG I can think of who managed to have a great transition from cute/innocent gnd concept to a more mature concept and still hit the jackpot.
The sexy concept brought quite a lot of Hits. We had Sistar, Girls Day, Exid and Secret. But while they did well with their more matured concept, they often struggled to have a stable fanbase and unfortunately you can see it when they disband and all the members go mia.
For me currently it seems like the Girl Crush concept is the safest, if you got successful with it. The Girl Crush concept is more a spectrum of many different concepts in one tbh. GG’s who do well with Girl Crush can actually move from different concept without it being much of a problem. Not just that, they also have it easier trying out different music genres.