Nowadays not only girl groups are outcharting boy groups but also out selling most of them, i say its right time for all boy groups to just go join army and leave the kpop scene

Quote from key10lee

There's already some out there. Were you unaware?

Quote from thebadguy

And they are complete flops, were you unaware?

There have actually been successful coed K-pop groups before: Roo'ra, Cool, UP, Sharp, Koyote, Troublemaker, and AKMU.