I see legacy western acts release 20th anniversary version of their albums with demos, outtakes, alternate versions, different tales (if they are a BAND) etc
I haven’t came across any K-pop group who has done that. Except for Mamamoo and BTS, I haven’t seen anyone else do that. If I’m missing anyone, do recommend!!!
Also, it’s interesting to hear different versions, remixes of the songs.
You know what, I personally would love it if EXO released box sets and stuff like that for their older albums and even unreleased demos and songs.