I’m an unashamed Discourse fan and have been for years but there is one thing that the enterprise platforms do better out of the box IMO, and that is orientate new users.
Members that are new to either Discourse, forums or a specific community sometimes need handholding in order to transition past lurking.
I’ve been working on a homepage/portal that directs people to try and overcome that.
We only launched today and are still tweaking, but you can see it in action here. It uses no plugins so is feasible for hosted sites. If you like it, talk to @joebuhlig – he did the hard work.