Day6 is the only BG that has gotten more popular after military.
Many BGs dont ever reach their peak status that they once had before military.
Day6 seems to be the outlier, being the first and proving that you can too still have a bigger career than you once did before the govt forced you into slavery
They even performed as a group during military
The only group that comes to my mind that managed to make noise after military is Big Bang, but they weren't making the noise at the level that they once did during their peak era
Also ...
Day6 is different, proving that by having a career bigger than ever.
Day6 truly opened doors to those who feel that their career is over once they enlist and is paving the way for the future of BGs. We might see more BGs follow Day6 footsteps in having a career post military because Day6 showed and proved that it is indeed possible.