Most Big 3 groups dont deserve their success. They are automatically a success 5 years before they debut because they are big 3. Even new kpop fans from yesterday know about Big 3 privilege. And no there is no such thing as Big 4. You need more than 1 successful group to join the elite.
Starship has brought top notch music, visuals, talent, and charisma with IVE and now are swimming in the success of their amazing achievement of a damn near perfect girl group. We haven't seen a non big 3 girl group achieve this since T-ara.
So many groups were poised to have this same success but fucked it up by releasing horrible music because Blackpink made it trendy.
IVE has taught everyone else a valuable lesson. Just be yourself and people will support you.
RIP 4th gen girl groups post IVE.