Are top 4 kpop groups ever set in stone?

Love how everyone collectively forgets 1st gen of kpop as if they weren't the first ones to exist and get big...

It depends on what criteria you go by but I would agree with that list as far as biggest influence

that's not what people seem to usually go for though, they seem to like to talk about who is the biggest at the moment

Agree.

EXO should be there. Make it Top 5.

And don't ask me why?