I'm definitely a no for discord for the RP. It's extremely rare for a roleplay to thrive with an active discord. All of the chat being done in the OOC keeps the thread active.
If Micki were to step down as Batman I'd rather I take on the role and make it a team sheet since my Robin's directly connected to the story and character already written.
I personally think that's largely an excuse people use for games to die, the few multi year games on the server at the moment largely (maybe even entirely I just don't trust that I am being exhaustive) have discords as do the most active by post count. I don't think it has ever had as much impact on whether or not a game works as people have presumed.
That said as I mentioned I don't think it is
required either, just a thought given we had someone struggling with keeping up with ooc chatter.
Which ironically this probably isn't helping.
Oops.