we have plenty big company with great legacy throughout generation producing multiple legendary group. back then when it comes to girl group, JYP is the powerhouse with their back to back succesful girl group from having Wonder Girls, Miss A and TWICE, also ITZY debut era. YG are known for being a massive digital momster house with their legendary girl group 2NE1 and Blackpink who are household name in KPOP industry. but sadly both company who have great track record shows a sudden downfall on the current generation with ITZY, NMIXX & Baemon doing very underwhelming when it comes to their senior standard.
On the other hands we have SM who have S.E.S, SNSD, f(x) and RV. and they are the only company out of big 3 who manage to continue their legacy with Aespa on 4th gen. Its a streak from 1st to 4th generation with succesful girl group. Why SM is the only company that manage to do so?