With all respect to the topic, the wekeast point of NodeBB is its unfriendly monetization options for webmasters, which keeps several people away from it. Missing app support is also something to mention, but for most webmasters money goes first.
@julian didn't you demo to a roomful of 200 people at DevTO on a shared environment with a gig of ram?
I think we have a long way to go with scalability AND usability - but I hope we're on the right track and we'll have the community's support in making sure we get there!
The plugin needs a bit of work as @julian keeps QQing about
It's not part of core, and in the near future I'd like to resolve them!