An interesting discussion just popped up over at the nodebb.org forum:
Well, after using the dual composer feature on a few sites besides this one such as the one on Dillinger, Ghost, Discourse and a few other sites, I’ve come to the conclusion that the dual composer is a failure for the use of a forum for many reasons.
When you are composing something, you want as much space as possible to write. I feel squeezed and constrained in a sense because I have this window pane to the right of me taking up half the space to write on. I’m sure there are mixed feelings about this, but if I had to choose whether I wanted the double pane view or the single WYSIWYG editor, I would definitely choose WYSIWYG.
Now, we could have our own forked discussion here, but frankly I think the neighbourly thing to do would be to go on over there, put in your 2 cents, and get a feel for a slightly different kind of forum experience while you’re at it.