I think Jeff put it very clearly here:
I have a high(ish) traffic, yet low user count, non-tech forum and the editor has not been a concern for my audience. And yes, they have raised lots of other concerns, but I don’t think that the editor/wysiwyg thing was never brought up. The new forum was constructed as an open community project, so they all had opportunities to contribute (and they did).
We migrated from SMF.