Actually, the problem is that we can't create another RP page or something like that starting from zero.
First of all, Discord would be filled of some dead RPs, unless they are able to be removed of course (Haven't been notified about that DX)
Second, no direct notifications, at least from Mails, Discord doesn't sends you a message from Discord and, who knows, maybe they posted like +100 Messages without letting you know? I don't know, but personally the notification system here is better, compared that there are thousands of dead RP's and you can go directly to the active ones. People aren't all the time on Discord, and that's a point to consider.
And third, creating channels on Discord is actually a bit bad, since probably only Admins or Moderators (Not sure about them able) could be able to do more RPs, and that's a BIG problem right there, we can't make something without thinking, and having the powers of doing them, yes, we may be the same guys that do RPs, but can't we let other people make them? Its like every staff of here can only do RPs and the only thing we can do is participate on them, without making ours.
Additionally, its a very famous part of begineers to start, so if its removed, it will become a serious wikia, and the only ones that will want to enter, are the ones that want to edit heavily or participate on gaming forums. Just saying, since I am 90% Non-Mainspace edits, imagine all that, I got like 3000 general edits just for RP, guys, the RP is something easy and fun to begin with, don't make it something serious, because then the wikia may die.
And yes its a long argument and I didn't copypasted it ;P