Yeah, I mean like football transfers, when one club pays another to snatch their player. Honestly, it'd be awesome. Groups will remain, while they'd constantly be able to add new members from other groups. Like imagine someone collecting all popular idols in one group, like some freaking Kpop PSG.
SM already tried to do it with Super M, Station 0 with Seulgi, SinB, Chungha and Soyeon, so it is not unprecedented. I seriously like this idea. I did smoke tho a bit today.